iisg.nl Website Information
Daily Unique Visits: 45,653
Daily Page Views: 273,918
Income Per Day: $548
Estimated Value: $394,560
This website is located in Netherlands and is using following IP address 195.169.88.80. See the complete list of popular websites hosted in Netherlands.
iisg.nl is registered under .NL top-level domain. Please check other sites in .NL zone.
Website iisg.nl is using the following name servers:
- ns1.surfnet.nl
- ns0.socialhistoryservices.org
- ns1.zurich.surf.net
and is probably hosted by SURFnet bv. See the full list of other websites hosted by SURFnet bv.
The highest website iisg.nl position in Alexa rank database was 29637 and the lowest rank position was 999778. Current position of iisg.nl in Alexa rank database is 31416.
Desktop speed score of iisg.nl (70/100) is better than the results of 50.91% of other sites and shows that the page desktop performance can be improved.
Mobile usability score of iisg.nl (91/100) is better than the results of 32.41% of other sites and means that the page is mobile-friendly.
Mobile speed score of iisg.nl (61/100) is better than the results of 57.04% of other sites and shows that the landing page performance on mobile devices is poor and can be improved.
Advertisement
iisg.nl Alexa Rank
The traffic rank is based on three months of aggregated historical traffic data from millions of Alexa Toolbar users and is a combined measure of page views and users.
iisg.nl whois
WHOIS gives you the ability to lookup any generic domains to find out the registered domain holder. WHOIS database are provided for information purposes only. It allows the public to check whether a specific domain name is still available or not and to obtain information related to the registration records of existing domain names.
Domain name: iisg.nl
Status: active
Registrar:
SURF B.V.
Moreelsepark 48
3511EP Utrecht
Netherlands
Abuse Contact:
+31.887873000
cert@surfcert.nl
Creation Date: 1994-05-23
Updated Date: 2021-03-24
DNSSEC: no
Domain nameservers:
ns0.socialhistoryservices.org
ns1.socialhistoryservices.nl
ns2.socialhistoryservices.org
Record maintained by: NL Domain Registry
Copyright notice
No part of this publication may be reproduced, published, stored in a
retrieval system, or transmitted, in any form or by any means,
electronic, mechanical, recording, or otherwise, without prior
permission of the Foundation for Internet Domain Registration in the
Netherlands (SIDN).
These restrictions apply equally to registrars, except in that
reproductions and publications are permitted insofar as they are
reasonable, necessary and solely in the context of the registration
activities referred to in the General Terms and Conditions for .nl
Registrars.
Any use of this material for advertising, targeting commercial offers or
similar activities is explicitly forbidden and liable to result in legal
action. Anyone who is aware or suspects that such activities are taking
place is asked to inform the Foundation for Internet Domain Registration
in the Netherlands.
(c) The Foundation for Internet Domain Registration in the Netherlands
(SIDN) Dutch Copyright Act, protection of authors' rights (Section 10,
subsection 1, clause 1).
Status: active
Registrar:
SURF B.V.
Moreelsepark 48
3511EP Utrecht
Netherlands
Abuse Contact:
+31.887873000
cert@surfcert.nl
Creation Date: 1994-05-23
Updated Date: 2021-03-24
DNSSEC: no
Domain nameservers:
ns0.socialhistoryservices.org
ns1.socialhistoryservices.nl
ns2.socialhistoryservices.org
Record maintained by: NL Domain Registry
Copyright notice
No part of this publication may be reproduced, published, stored in a
retrieval system, or transmitted, in any form or by any means,
electronic, mechanical, recording, or otherwise, without prior
permission of the Foundation for Internet Domain Registration in the
Netherlands (SIDN).
These restrictions apply equally to registrars, except in that
reproductions and publications are permitted insofar as they are
reasonable, necessary and solely in the context of the registration
activities referred to in the General Terms and Conditions for .nl
Registrars.
Any use of this material for advertising, targeting commercial offers or
similar activities is explicitly forbidden and liable to result in legal
action. Anyone who is aware or suspects that such activities are taking
place is asked to inform the Foundation for Internet Domain Registration
in the Netherlands.
(c) The Foundation for Internet Domain Registration in the Netherlands
(SIDN) Dutch Copyright Act, protection of authors' rights (Section 10,
subsection 1, clause 1).
iisg.nl server information
Servers Location
iisg.nl desktop page speed rank
Last tested: 2017-04-27
Desktop Speed
Medium
70/100
iisg.nl Desktop Speed Test Quick Summary
priority - 15Leverage browser caching
Setting an expiry date or a maximum age in the HTTP headers for static resources instructs the browser to load previously downloaded resources from local disk rather than over the network.
Leverage browser caching for the following cacheable resources:
https://socialhistory.org/sites/all/modules/contrib/extlink/extlink_s.png (expiration not specified)
https://socialhistory.org/sites/all/themes/iisg/images/banner-blue.png (expiration not specified)
https://socialhistory.org/sites/all/themes/iisg/images/banner-orange.png (expiration not specified)
https://socialhistory.org/sites/all/themes/iisg/images/browse-bg.png (expiration not specified)
https://socialhistory.org/sites/all/themes/iisg/images/facebook.png (expiration not specified)
https://socialhistory.org/sites/all/themes/iisg/images/flickr.png (expiration not specified)
https://socialhistory.org/sites/all/themes/iisg/images/hook-blue.png (expiration not specified)
https://socialhistory.org/sites/all/themes/iisg/images/hook-brown.png (expiration not specified)
https://socialhistory.org/sites/all/themes/iisg/images/hook-green.png (expiration not specified)
https://socialhistory.org/sites/all/themes/iisg/images/hook-red.png (expiration not specified)
https://socialhistory.org/sites/all/themes/iisg/images/hooks-small.png (expiration not specified)
https://socialhistory.org/sites/all/themes/iisg/images/linkedin.png (expiration not specified)
https://socialhistory.org/sites/all/themes/iisg/images/logo-en.png (expiration not specified)
https://socialhistory.org/sites/all/themes/iisg/images/plus-blue.png (expiration not specified)
https://socialhistory.org/sites/all/themes/iisg/images/rss.png (expiration not specified)
https://socialhistory.org/sites/all/themes/iisg/images/twitter.png (expiration not specified)
https://socialhistory.org/sites/default/files/css/…DgiUcqci3T2wKn3MAw.css (expiration not specified)
https://socialhistory.org/sites/default/files/css/…SWiHs58VzQVWwle67c.css (expiration not specified)
https://socialhistory.org/sites/default/files/css/…Fe-NHTMEO5VJbq5xmg.css (expiration not specified)
https://socialhistory.org/sites/default/files/css/…O3RXwQ8V_antxMcWGg.css (expiration not specified)
https://socialhistory.org/sites/default/files/css/…sZMJa-14jShHgRoRNo.css (expiration not specified)
https://socialhistory.org/sites/default/files/css/…nAVpkSeD_yPtUN9tBk.css (expiration not specified)
https://socialhistory.org/sites/default/files/instagram_for_footer.png (expiration not specified)
https://socialhistory.org/sites/default/files/js/j…ho-wMA6Yziy9sT28j2U.js (expiration not specified)
https://socialhistory.org/sites/default/files/js/j…-G1s8aHivBsfm4At28M.js (expiration not specified)
https://socialhistory.org/sites/default/files/js/j…52AlYOo_ZHCx_d777jg.js (expiration not specified)
https://socialhistory.org/sites/default/files/js/j…RUh8NNq_fZRTb6dsNb4.js (expiration not specified)
https://socialhistory.org/sites/default/files/js/j…pQioOMw4kuH9-Al36C0.js (expiration not specified)
https://socialhistory.org/sites/default/files/knaw.gif (expiration not specified)
https://socialhistory.org/sites/default/files/youtube-favicon_0.png (expiration not specified)
https://www.google-analytics.com/analytics.js (2 hours)
https://socialhistory.org/sites/all/themes/iisg/images/banner-blue.png (expiration not specified)
https://socialhistory.org/sites/all/themes/iisg/images/banner-orange.png (expiration not specified)
https://socialhistory.org/sites/all/themes/iisg/images/browse-bg.png (expiration not specified)
https://socialhistory.org/sites/all/themes/iisg/images/facebook.png (expiration not specified)
https://socialhistory.org/sites/all/themes/iisg/images/flickr.png (expiration not specified)
https://socialhistory.org/sites/all/themes/iisg/images/hook-blue.png (expiration not specified)
https://socialhistory.org/sites/all/themes/iisg/images/hook-brown.png (expiration not specified)
https://socialhistory.org/sites/all/themes/iisg/images/hook-green.png (expiration not specified)
https://socialhistory.org/sites/all/themes/iisg/images/hook-red.png (expiration not specified)
https://socialhistory.org/sites/all/themes/iisg/images/hooks-small.png (expiration not specified)
https://socialhistory.org/sites/all/themes/iisg/images/linkedin.png (expiration not specified)
https://socialhistory.org/sites/all/themes/iisg/images/logo-en.png (expiration not specified)
https://socialhistory.org/sites/all/themes/iisg/images/plus-blue.png (expiration not specified)
https://socialhistory.org/sites/all/themes/iisg/images/rss.png (expiration not specified)
https://socialhistory.org/sites/all/themes/iisg/images/twitter.png (expiration not specified)
https://socialhistory.org/sites/default/files/css/…DgiUcqci3T2wKn3MAw.css (expiration not specified)
https://socialhistory.org/sites/default/files/css/…SWiHs58VzQVWwle67c.css (expiration not specified)
https://socialhistory.org/sites/default/files/css/…Fe-NHTMEO5VJbq5xmg.css (expiration not specified)
https://socialhistory.org/sites/default/files/css/…O3RXwQ8V_antxMcWGg.css (expiration not specified)
https://socialhistory.org/sites/default/files/css/…sZMJa-14jShHgRoRNo.css (expiration not specified)
https://socialhistory.org/sites/default/files/css/…nAVpkSeD_yPtUN9tBk.css (expiration not specified)
https://socialhistory.org/sites/default/files/instagram_for_footer.png (expiration not specified)
https://socialhistory.org/sites/default/files/js/j…ho-wMA6Yziy9sT28j2U.js (expiration not specified)
https://socialhistory.org/sites/default/files/js/j…-G1s8aHivBsfm4At28M.js (expiration not specified)
https://socialhistory.org/sites/default/files/js/j…52AlYOo_ZHCx_d777jg.js (expiration not specified)
https://socialhistory.org/sites/default/files/js/j…RUh8NNq_fZRTb6dsNb4.js (expiration not specified)
https://socialhistory.org/sites/default/files/js/j…pQioOMw4kuH9-Al36C0.js (expiration not specified)
https://socialhistory.org/sites/default/files/knaw.gif (expiration not specified)
https://socialhistory.org/sites/default/files/youtube-favicon_0.png (expiration not specified)
https://www.google-analytics.com/analytics.js (2 hours)
priority - 9Optimize images
Properly formatting and compressing images can save many bytes of data.
Optimize the following images to reduce their size by 88.7KiB (36% reduction).
Compressing https://socialhistory.org/sites/default/files/styl…ar_0.jpg?itok=rzlNr5wG could save 21.3KiB (41% reduction).
Compressing https://socialhistory.org/sites/default/files/styl…ider.jpg?itok=y6Gg-KZz could save 18.2KiB (82% reduction).
Compressing https://socialhistory.org/sites/default/files/styl…2001.jpg?itok=SCCINEyi could save 17.5KiB (79% reduction).
Compressing https://socialhistory.org/sites/default/files/styl…and.jpeg?itok=HATtQ8wo could save 7.1KiB (26% reduction).
Compressing https://socialhistory.org/sites/default/files/styl…rane.jpg?itok=Jg3tIvpd could save 6.5KiB (15% reduction).
Compressing https://socialhistory.org/sites/default/files/styl…1883.jpg?itok=aqm83vCX could save 5.5KiB (20% reduction).
Compressing https://socialhistory.org/sites/all/themes/iisg/images/logo-en.png could save 4.7KiB (27% reduction).
Compressing https://socialhistory.org/sites/all/themes/iisg/images/flickr.png could save 2.7KiB (79% reduction).
Compressing https://socialhistory.org/sites/default/files/styl…dama.jpg?itok=2F2gqwdf could save 2.1KiB (13% reduction).
Compressing https://socialhistory.org/sites/default/files/styl…echt.jpg?itok=e3RShUi0 could save 1.4KiB (40% reduction).
Compressing https://socialhistory.org/sites/default/files/styl…ders.jpg?itok=RQ9htJIb could save 913B (14% reduction).
Compressing https://socialhistory.org/sites/all/themes/iisg/images/rss.png could save 786B (37% reduction).
Compressing https://socialhistory.org/sites/default/files/styl…ider.jpg?itok=y6Gg-KZz could save 18.2KiB (82% reduction).
Compressing https://socialhistory.org/sites/default/files/styl…2001.jpg?itok=SCCINEyi could save 17.5KiB (79% reduction).
Compressing https://socialhistory.org/sites/default/files/styl…and.jpeg?itok=HATtQ8wo could save 7.1KiB (26% reduction).
Compressing https://socialhistory.org/sites/default/files/styl…rane.jpg?itok=Jg3tIvpd could save 6.5KiB (15% reduction).
Compressing https://socialhistory.org/sites/default/files/styl…1883.jpg?itok=aqm83vCX could save 5.5KiB (20% reduction).
Compressing https://socialhistory.org/sites/all/themes/iisg/images/logo-en.png could save 4.7KiB (27% reduction).
Compressing https://socialhistory.org/sites/all/themes/iisg/images/flickr.png could save 2.7KiB (79% reduction).
Compressing https://socialhistory.org/sites/default/files/styl…dama.jpg?itok=2F2gqwdf could save 2.1KiB (13% reduction).
Compressing https://socialhistory.org/sites/default/files/styl…echt.jpg?itok=e3RShUi0 could save 1.4KiB (40% reduction).
Compressing https://socialhistory.org/sites/default/files/styl…ders.jpg?itok=RQ9htJIb could save 913B (14% reduction).
Compressing https://socialhistory.org/sites/all/themes/iisg/images/rss.png could save 786B (37% reduction).
priority - 8Eliminate render-blocking JavaScript and CSS in above-the-fold content
Your page has 5 blocking script resources and 6 blocking CSS resources. This causes a delay in rendering your page.
Remove render-blocking JavaScript:
https://socialhistory.org/sites/default/files/js/j…ho-wMA6Yziy9sT28j2U.js
https://socialhistory.org/sites/default/files/js/j…-G1s8aHivBsfm4At28M.js
https://socialhistory.org/sites/default/files/js/j…pQioOMw4kuH9-Al36C0.js
https://socialhistory.org/sites/default/files/js/j…52AlYOo_ZHCx_d777jg.js
https://socialhistory.org/sites/default/files/js/j…RUh8NNq_fZRTb6dsNb4.js
https://socialhistory.org/sites/default/files/js/j…-G1s8aHivBsfm4At28M.js
https://socialhistory.org/sites/default/files/js/j…pQioOMw4kuH9-Al36C0.js
https://socialhistory.org/sites/default/files/js/j…52AlYOo_ZHCx_d777jg.js
https://socialhistory.org/sites/default/files/js/j…RUh8NNq_fZRTb6dsNb4.js
Optimize CSS Delivery of the following:
https://socialhistory.org/sites/default/files/css/…nAVpkSeD_yPtUN9tBk.css
https://socialhistory.org/sites/default/files/css/…sZMJa-14jShHgRoRNo.css
https://socialhistory.org/sites/default/files/css/…DgiUcqci3T2wKn3MAw.css
https://socialhistory.org/sites/default/files/css/…O3RXwQ8V_antxMcWGg.css
https://socialhistory.org/sites/default/files/css/…Fe-NHTMEO5VJbq5xmg.css
https://socialhistory.org/sites/default/files/css/…SWiHs58VzQVWwle67c.css
https://socialhistory.org/sites/default/files/css/…sZMJa-14jShHgRoRNo.css
https://socialhistory.org/sites/default/files/css/…DgiUcqci3T2wKn3MAw.css
https://socialhistory.org/sites/default/files/css/…O3RXwQ8V_antxMcWGg.css
https://socialhistory.org/sites/default/files/css/…Fe-NHTMEO5VJbq5xmg.css
https://socialhistory.org/sites/default/files/css/…SWiHs58VzQVWwle67c.css
priority - 7Avoid landing page redirects
Your page has 2 redirects. Redirects introduce additional delays before the page can be loaded.
Avoid landing page redirects for the following chain of redirected URLs.
http://iisg.nl/
http://socialhistory.org/en
https://socialhistory.org/en
http://socialhistory.org/en
https://socialhistory.org/en
priority - 2Minify JavaScript
Compacting JavaScript code can save many bytes of data and speed up downloading, parsing, and execution time.
Minify JavaScript for the following resources to reduce their size by 23.2KiB (28% reduction).
Minifying https://socialhistory.org/sites/default/files/js/j…52AlYOo_ZHCx_d777jg.js could save 13.6KiB (42% reduction) after compression.
Minifying https://socialhistory.org/sites/default/files/js/j…ho-wMA6Yziy9sT28j2U.js could save 4.4KiB (12% reduction) after compression.
Minifying https://socialhistory.org/sites/default/files/js/j…-G1s8aHivBsfm4At28M.js could save 3.6KiB (45% reduction) after compression.
Minifying https://socialhistory.org/sites/default/files/js/j…pQioOMw4kuH9-Al36C0.js could save 876B (45% reduction) after compression.
Minifying https://socialhistory.org/sites/default/files/js/j…RUh8NNq_fZRTb6dsNb4.js could save 668B (31% reduction) after compression.
Minifying https://socialhistory.org/sites/default/files/js/j…ho-wMA6Yziy9sT28j2U.js could save 4.4KiB (12% reduction) after compression.
Minifying https://socialhistory.org/sites/default/files/js/j…-G1s8aHivBsfm4At28M.js could save 3.6KiB (45% reduction) after compression.
Minifying https://socialhistory.org/sites/default/files/js/j…pQioOMw4kuH9-Al36C0.js could save 876B (45% reduction) after compression.
Minifying https://socialhistory.org/sites/default/files/js/j…RUh8NNq_fZRTb6dsNb4.js could save 668B (31% reduction) after compression.
iisg.nl Desktop Resource Breakdown
| Total Resources | 47 |
| Number of Hosts | 4 |
| Static Resources | 31 |
| JavaScript Resources | 6 |
| CSS Resources | 6 |
iisg.nl mobile page speed rank
Last tested: 2018-07-01
Mobile Speed
Bad
61/100
iisg.nl Mobile Speed Test Quick Summary
priority - 26Avoid landing page redirects
Your page has 2 redirects. Redirects introduce additional delays before the page can be loaded.
Avoid landing page redirects for the following chain of redirected URLs.
http://iisg.nl/
http://socialhistory.org/en
https://socialhistory.org/en
http://socialhistory.org/en
https://socialhistory.org/en
priority - 23Leverage browser caching
Setting an expiry date or a maximum age in the HTTP headers for static resources instructs the browser to load previously downloaded resources from local disk rather than over the network.
Leverage browser caching for the following cacheable resources:
https://socialhistory.org/sites/all/modules/contrib/extlink/extlink_s.png (expiration not specified)
https://socialhistory.org/sites/all/themes/iisg/images/banner-blue.png (expiration not specified)
https://socialhistory.org/sites/all/themes/iisg/images/banner-orange.png (expiration not specified)
https://socialhistory.org/sites/all/themes/iisg/images/browse-bg.png (expiration not specified)
https://socialhistory.org/sites/all/themes/iisg/images/facebook.png (expiration not specified)
https://socialhistory.org/sites/all/themes/iisg/images/flickr.png (expiration not specified)
https://socialhistory.org/sites/all/themes/iisg/images/hook-blue.png (expiration not specified)
https://socialhistory.org/sites/all/themes/iisg/images/hook-brown.png (expiration not specified)
https://socialhistory.org/sites/all/themes/iisg/images/hook-red.png (expiration not specified)
https://socialhistory.org/sites/all/themes/iisg/images/hook-yellow.png (expiration not specified)
https://socialhistory.org/sites/all/themes/iisg/images/hooks-small.png (expiration not specified)
https://socialhistory.org/sites/all/themes/iisg/images/linkedin.png (expiration not specified)
https://socialhistory.org/sites/all/themes/iisg/images/logo-en.png (expiration not specified)
https://socialhistory.org/sites/all/themes/iisg/images/plus-blue.png (expiration not specified)
https://socialhistory.org/sites/all/themes/iisg/images/rss.png (expiration not specified)
https://socialhistory.org/sites/all/themes/iisg/images/twitter.png (expiration not specified)
https://socialhistory.org/sites/default/files/css/…DgiUcqci3T2wKn3MAw.css (expiration not specified)
https://socialhistory.org/sites/default/files/css/…SWiHs58VzQVWwle67c.css (expiration not specified)
https://socialhistory.org/sites/default/files/css/…DQUs4cO_HL_qz8XlK0.css (expiration not specified)
https://socialhistory.org/sites/default/files/css/…Fe-NHTMEO5VJbq5xmg.css (expiration not specified)
https://socialhistory.org/sites/default/files/css/…sZMJa-14jShHgRoRNo.css (expiration not specified)
https://socialhistory.org/sites/default/files/css/…nAVpkSeD_yPtUN9tBk.css (expiration not specified)
https://socialhistory.org/sites/default/files/instagram_for_footer.png (expiration not specified)
https://socialhistory.org/sites/default/files/js/j…Q-aiA4_iTdfnen6XWRE.js (expiration not specified)
https://socialhistory.org/sites/default/files/js/j…XlB7IeAy3DQdubXCZG0.js (expiration not specified)
https://socialhistory.org/sites/default/files/js/j…sxd4cA8KM0jkogZEw68.js (expiration not specified)
https://socialhistory.org/sites/default/files/js/j…RUh8NNq_fZRTb6dsNb4.js (expiration not specified)
https://socialhistory.org/sites/default/files/js/j…pQioOMw4kuH9-Al36C0.js (expiration not specified)
https://socialhistory.org/sites/default/files/knaw.gif (expiration not specified)
https://socialhistory.org/sites/default/files/youtube-favicon_0.png (expiration not specified)
https://www.google-analytics.com/analytics.js (2 hours)
https://socialhistory.org/sites/all/themes/iisg/images/banner-blue.png (expiration not specified)
https://socialhistory.org/sites/all/themes/iisg/images/banner-orange.png (expiration not specified)
https://socialhistory.org/sites/all/themes/iisg/images/browse-bg.png (expiration not specified)
https://socialhistory.org/sites/all/themes/iisg/images/facebook.png (expiration not specified)
https://socialhistory.org/sites/all/themes/iisg/images/flickr.png (expiration not specified)
https://socialhistory.org/sites/all/themes/iisg/images/hook-blue.png (expiration not specified)
https://socialhistory.org/sites/all/themes/iisg/images/hook-brown.png (expiration not specified)
https://socialhistory.org/sites/all/themes/iisg/images/hook-red.png (expiration not specified)
https://socialhistory.org/sites/all/themes/iisg/images/hook-yellow.png (expiration not specified)
https://socialhistory.org/sites/all/themes/iisg/images/hooks-small.png (expiration not specified)
https://socialhistory.org/sites/all/themes/iisg/images/linkedin.png (expiration not specified)
https://socialhistory.org/sites/all/themes/iisg/images/logo-en.png (expiration not specified)
https://socialhistory.org/sites/all/themes/iisg/images/plus-blue.png (expiration not specified)
https://socialhistory.org/sites/all/themes/iisg/images/rss.png (expiration not specified)
https://socialhistory.org/sites/all/themes/iisg/images/twitter.png (expiration not specified)
https://socialhistory.org/sites/default/files/css/…DgiUcqci3T2wKn3MAw.css (expiration not specified)
https://socialhistory.org/sites/default/files/css/…SWiHs58VzQVWwle67c.css (expiration not specified)
https://socialhistory.org/sites/default/files/css/…DQUs4cO_HL_qz8XlK0.css (expiration not specified)
https://socialhistory.org/sites/default/files/css/…Fe-NHTMEO5VJbq5xmg.css (expiration not specified)
https://socialhistory.org/sites/default/files/css/…sZMJa-14jShHgRoRNo.css (expiration not specified)
https://socialhistory.org/sites/default/files/css/…nAVpkSeD_yPtUN9tBk.css (expiration not specified)
https://socialhistory.org/sites/default/files/instagram_for_footer.png (expiration not specified)
https://socialhistory.org/sites/default/files/js/j…Q-aiA4_iTdfnen6XWRE.js (expiration not specified)
https://socialhistory.org/sites/default/files/js/j…XlB7IeAy3DQdubXCZG0.js (expiration not specified)
https://socialhistory.org/sites/default/files/js/j…sxd4cA8KM0jkogZEw68.js (expiration not specified)
https://socialhistory.org/sites/default/files/js/j…RUh8NNq_fZRTb6dsNb4.js (expiration not specified)
https://socialhistory.org/sites/default/files/js/j…pQioOMw4kuH9-Al36C0.js (expiration not specified)
https://socialhistory.org/sites/default/files/knaw.gif (expiration not specified)
https://socialhistory.org/sites/default/files/youtube-favicon_0.png (expiration not specified)
https://www.google-analytics.com/analytics.js (2 hours)
priority - 8Eliminate render-blocking JavaScript and CSS in above-the-fold content
Your page has 1 blocking CSS resources. This causes a delay in rendering your page.
Optimize CSS Delivery of the following:
https://socialhistory.org/sites/default/files/css/…nAVpkSeD_yPtUN9tBk.css
priority - 7Optimize images
Properly formatting and compressing images can save many bytes of data.
Optimize the following images to reduce their size by 69.1KiB (36% reduction).
Compressing https://socialhistory.org/sites/default/files/styl…ar_0.jpg?itok=rzlNr5wG could save 21.3KiB (41% reduction).
Compressing https://socialhistory.org/sites/default/files/styl…reen.jpg?itok=ntdFPr_7 could save 19KiB (84% reduction).
Compressing https://socialhistory.org/sites/default/files/styl…all.jpeg?itok=GtzHx4ms could save 8.9KiB (22% reduction).
Compressing https://socialhistory.org/sites/default/files/styl…1883.jpg?itok=aqm83vCX could save 5.5KiB (20% reduction).
Compressing https://socialhistory.org/sites/all/themes/iisg/images/logo-en.png could save 4.7KiB (27% reduction).
Compressing https://socialhistory.org/sites/all/themes/iisg/images/flickr.png could save 2.7KiB (79% reduction).
Compressing https://socialhistory.org/sites/default/files/styl…op_0.jpg?itok=0ykJbRfT could save 2.3KiB (66% reduction).
Compressing https://socialhistory.org/sites/default/files/styl…dama.jpg?itok=2F2gqwdf could save 2.1KiB (13% reduction).
Compressing https://socialhistory.org/sites/all/themes/iisg/images/rss.png could save 786B (37% reduction).
Compressing https://socialhistory.org/sites/default/files/styl…blad.jpg?itok=OPz6DObG could save 774B (13% reduction).
Compressing https://socialhistory.org/sites/all/themes/iisg/images/banner-blue.png could save 362B (33% reduction).
Compressing https://socialhistory.org/sites/all/themes/iisg/images/hooks-small.png could save 251B (43% reduction).
Compressing https://socialhistory.org/sites/all/themes/iisg/images/banner-orange.png could save 199B (22% reduction).
Compressing https://socialhistory.org/sites/all/themes/iisg/images/browse-bg.png could save 177B (31% reduction).
Compressing https://socialhistory.org/sites/all/themes/iisg/images/plus-blue.png could save 123B (58% reduction).
Compressing https://socialhistory.org/sites/default/files/styl…reen.jpg?itok=ntdFPr_7 could save 19KiB (84% reduction).
Compressing https://socialhistory.org/sites/default/files/styl…all.jpeg?itok=GtzHx4ms could save 8.9KiB (22% reduction).
Compressing https://socialhistory.org/sites/default/files/styl…1883.jpg?itok=aqm83vCX could save 5.5KiB (20% reduction).
Compressing https://socialhistory.org/sites/all/themes/iisg/images/logo-en.png could save 4.7KiB (27% reduction).
Compressing https://socialhistory.org/sites/all/themes/iisg/images/flickr.png could save 2.7KiB (79% reduction).
Compressing https://socialhistory.org/sites/default/files/styl…op_0.jpg?itok=0ykJbRfT could save 2.3KiB (66% reduction).
Compressing https://socialhistory.org/sites/default/files/styl…dama.jpg?itok=2F2gqwdf could save 2.1KiB (13% reduction).
Compressing https://socialhistory.org/sites/all/themes/iisg/images/rss.png could save 786B (37% reduction).
Compressing https://socialhistory.org/sites/default/files/styl…blad.jpg?itok=OPz6DObG could save 774B (13% reduction).
Compressing https://socialhistory.org/sites/all/themes/iisg/images/banner-blue.png could save 362B (33% reduction).
Compressing https://socialhistory.org/sites/all/themes/iisg/images/hooks-small.png could save 251B (43% reduction).
Compressing https://socialhistory.org/sites/all/themes/iisg/images/banner-orange.png could save 199B (22% reduction).
Compressing https://socialhistory.org/sites/all/themes/iisg/images/browse-bg.png could save 177B (31% reduction).
Compressing https://socialhistory.org/sites/all/themes/iisg/images/plus-blue.png could save 123B (58% reduction).
priority - 2Minify JavaScript
Compacting JavaScript code can save many bytes of data and speed up downloading, parsing, and execution time.
Minify JavaScript for the following resources to reduce their size by 24.1KiB (29% reduction).
Minifying https://socialhistory.org/sites/default/files/js/j…Q-aiA4_iTdfnen6XWRE.js could save 13.8KiB (42% reduction) after compression.
Minifying https://socialhistory.org/sites/default/files/js/j…sxd4cA8KM0jkogZEw68.js could save 5.2KiB (13% reduction) after compression.
Minifying https://socialhistory.org/sites/default/files/js/j…XlB7IeAy3DQdubXCZG0.js could save 3.6KiB (45% reduction) after compression.
Minifying https://socialhistory.org/sites/default/files/js/j…pQioOMw4kuH9-Al36C0.js could save 876B (45% reduction) after compression.
Minifying https://socialhistory.org/sites/default/files/js/j…RUh8NNq_fZRTb6dsNb4.js could save 668B (31% reduction) after compression.
Minifying https://socialhistory.org/sites/default/files/js/j…sxd4cA8KM0jkogZEw68.js could save 5.2KiB (13% reduction) after compression.
Minifying https://socialhistory.org/sites/default/files/js/j…XlB7IeAy3DQdubXCZG0.js could save 3.6KiB (45% reduction) after compression.
Minifying https://socialhistory.org/sites/default/files/js/j…pQioOMw4kuH9-Al36C0.js could save 876B (45% reduction) after compression.
Minifying https://socialhistory.org/sites/default/files/js/j…RUh8NNq_fZRTb6dsNb4.js could save 668B (31% reduction) after compression.
iisg.nl Mobile Resource Breakdown
| Total Resources | 44 |
| Number of Hosts | 4 |
| Static Resources | 31 |
| JavaScript Resources | 6 |
| CSS Resources | 6 |
iisg.nl mobile page usability
Last tested: 2018-07-01
Mobile Usability
Good
91/100
iisg.nl Mobile Usability Test Quick Summary
priority - 8Size content to viewport
The page content is too wide for the viewport, forcing the user to scroll horizontally. Size the page content to the viewport to provide a better user experience.
The page content is 470 CSS pixels wide, but the viewport is only 412 CSS pixels wide. The following elements fall outside the viewport:
The element
The element
The element
The element
The element
The element
The element
The element
The element
The element
<span class="field-content">Students brows…ISH collection</span> falls outside the viewport.The element
<span id="views_slidesho…ueue_1-block_0" class="views-slidesho…w-first active">+</span> falls outside the viewport.The element
<span id="views_slidesho…ueue_1-block_1" class="views-slidesho…views-row-even">+</span> falls outside the viewport.The element
<span id="views_slidesho…ueue_1-block_2" class="views-slidesho…views-row-odd">+</span> falls outside the viewport.The element
<span id="views_slidesho…ueue_1-block_3" class="views-slidesho…views-row-even">+</span> falls outside the viewport.The element
<span id="views_slidesho…ueue_1-block_4" class="views-slidesho…views-row-last">+</span> falls outside the viewport.The element
<h3>International…Social History</h3> falls outside the viewport.The element
<p>The Internatio…s well. + more</p> falls outside the viewport.The element
<div class="view-empty">There are no v…een vacatures.</div> falls outside the viewport.The element
<div class="banner-blue">Book Blog</div> falls outside the viewport.priority - 1Size tap targets appropriately
Some of the links/buttons on your webpage may be too small for a user to easily tap on a touchscreen. Consider making these tap targets larger to provide a better user experience.
The following tap targets are close to other nearby tap targets and may need additional spacing around them.
The tap target
<input id="edit-custom-se…earchnode-key-" type="radio" name="custom_search_paths" class="form-radio"> and 1 others are close to other tap targets.The tap target
<label for="edit-custom-se…earchnode-key-" class="option">website</label> and 1 others are close to other tap targets.The tap target
<span id="views_slidesho…ueue_1-block_0" class="views-slidesho…w-first active">+</span> is close to 1 other tap targets.The tap target
<span id="views_slidesho…ueue_1-block_1" class="views-slidesho…views-row-even">+</span> and 3 others are close to other tap targets.The tap target
<a href="http://www.fac…Social.History"></a> and 5 others are close to other tap targets.iisg.nl HTML validation
Errors
Legacy doctype. Expected “<!DOCTYPE html>”.
Line: 1 Column: 1 - 54
"...<!DOCTYPE html PUBLIC "-//W3C//DTD HTML+RDFa 1.1//EN"> <html..."
"...<!DOCTYPE html PUBLIC "-//W3C//DTD HTML+RDFa 1.1//EN"> <html..."
Attribute “xmlns:content” not allowed here.
Line: 11 Column: 55 - 48
"... 1.1//EN"> <html lang="en" dir="ltr" version="HTML+RDFa 1.1" xmlns:content="http://purl.org/rss/1.0/modules/content/" xmlns:dc="http://purl.org/dc/terms/" xmlns:foaf="http://xmlns.com/foaf/0.1/" xmlns:og="http://ogp.me/ns#" xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#" xmlns:sioc="http://rdfs.org/sioc/ns#" xmlns:sioct="http://rdfs.org/sioc/types#" xmlns:skos="http://www.w3.org/2004/02/skos/core#" xmlns:xsd="http://www.w3.org/2001/XMLSchema#"> <head..."
"... 1.1//EN"> <html lang="en" dir="ltr" version="HTML+RDFa 1.1" xmlns:content="http://purl.org/rss/1.0/modules/content/" xmlns:dc="http://purl.org/dc/terms/" xmlns:foaf="http://xmlns.com/foaf/0.1/" xmlns:og="http://ogp.me/ns#" xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#" xmlns:sioc="http://rdfs.org/sioc/ns#" xmlns:sioct="http://rdfs.org/sioc/types#" xmlns:skos="http://www.w3.org/2004/02/skos/core#" xmlns:xsd="http://www.w3.org/2001/XMLSchema#"> <head..."
Attribute “xmlns:dc” not allowed here.
Line: 11 Column: 55 - 48
"... 1.1//EN"> <html lang="en" dir="ltr" version="HTML+RDFa 1.1" xmlns:content="http://purl.org/rss/1.0/modules/content/" xmlns:dc="http://purl.org/dc/terms/" xmlns:foaf="http://xmlns.com/foaf/0.1/" xmlns:og="http://ogp.me/ns#" xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#" xmlns:sioc="http://rdfs.org/sioc/ns#" xmlns:sioct="http://rdfs.org/sioc/types#" xmlns:skos="http://www.w3.org/2004/02/skos/core#" xmlns:xsd="http://www.w3.org/2001/XMLSchema#"> <head..."
"... 1.1//EN"> <html lang="en" dir="ltr" version="HTML+RDFa 1.1" xmlns:content="http://purl.org/rss/1.0/modules/content/" xmlns:dc="http://purl.org/dc/terms/" xmlns:foaf="http://xmlns.com/foaf/0.1/" xmlns:og="http://ogp.me/ns#" xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#" xmlns:sioc="http://rdfs.org/sioc/ns#" xmlns:sioct="http://rdfs.org/sioc/types#" xmlns:skos="http://www.w3.org/2004/02/skos/core#" xmlns:xsd="http://www.w3.org/2001/XMLSchema#"> <head..."
Attribute “xmlns:foaf” not allowed here.
Line: 11 Column: 55 - 48
"... 1.1//EN"> <html lang="en" dir="ltr" version="HTML+RDFa 1.1" xmlns:content="http://purl.org/rss/1.0/modules/content/" xmlns:dc="http://purl.org/dc/terms/" xmlns:foaf="http://xmlns.com/foaf/0.1/" xmlns:og="http://ogp.me/ns#" xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#" xmlns:sioc="http://rdfs.org/sioc/ns#" xmlns:sioct="http://rdfs.org/sioc/types#" xmlns:skos="http://www.w3.org/2004/02/skos/core#" xmlns:xsd="http://www.w3.org/2001/XMLSchema#"> <head..."
"... 1.1//EN"> <html lang="en" dir="ltr" version="HTML+RDFa 1.1" xmlns:content="http://purl.org/rss/1.0/modules/content/" xmlns:dc="http://purl.org/dc/terms/" xmlns:foaf="http://xmlns.com/foaf/0.1/" xmlns:og="http://ogp.me/ns#" xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#" xmlns:sioc="http://rdfs.org/sioc/ns#" xmlns:sioct="http://rdfs.org/sioc/types#" xmlns:skos="http://www.w3.org/2004/02/skos/core#" xmlns:xsd="http://www.w3.org/2001/XMLSchema#"> <head..."
Attribute “xmlns:og” not allowed here.
Line: 11 Column: 55 - 48
"... 1.1//EN"> <html lang="en" dir="ltr" version="HTML+RDFa 1.1" xmlns:content="http://purl.org/rss/1.0/modules/content/" xmlns:dc="http://purl.org/dc/terms/" xmlns:foaf="http://xmlns.com/foaf/0.1/" xmlns:og="http://ogp.me/ns#" xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#" xmlns:sioc="http://rdfs.org/sioc/ns#" xmlns:sioct="http://rdfs.org/sioc/types#" xmlns:skos="http://www.w3.org/2004/02/skos/core#" xmlns:xsd="http://www.w3.org/2001/XMLSchema#"> <head..."
"... 1.1//EN"> <html lang="en" dir="ltr" version="HTML+RDFa 1.1" xmlns:content="http://purl.org/rss/1.0/modules/content/" xmlns:dc="http://purl.org/dc/terms/" xmlns:foaf="http://xmlns.com/foaf/0.1/" xmlns:og="http://ogp.me/ns#" xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#" xmlns:sioc="http://rdfs.org/sioc/ns#" xmlns:sioct="http://rdfs.org/sioc/types#" xmlns:skos="http://www.w3.org/2004/02/skos/core#" xmlns:xsd="http://www.w3.org/2001/XMLSchema#"> <head..."
Attribute “xmlns:rdfs” not allowed here.
Line: 11 Column: 55 - 48
"... 1.1//EN"> <html lang="en" dir="ltr" version="HTML+RDFa 1.1" xmlns:content="http://purl.org/rss/1.0/modules/content/" xmlns:dc="http://purl.org/dc/terms/" xmlns:foaf="http://xmlns.com/foaf/0.1/" xmlns:og="http://ogp.me/ns#" xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#" xmlns:sioc="http://rdfs.org/sioc/ns#" xmlns:sioct="http://rdfs.org/sioc/types#" xmlns:skos="http://www.w3.org/2004/02/skos/core#" xmlns:xsd="http://www.w3.org/2001/XMLSchema#"> <head..."
"... 1.1//EN"> <html lang="en" dir="ltr" version="HTML+RDFa 1.1" xmlns:content="http://purl.org/rss/1.0/modules/content/" xmlns:dc="http://purl.org/dc/terms/" xmlns:foaf="http://xmlns.com/foaf/0.1/" xmlns:og="http://ogp.me/ns#" xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#" xmlns:sioc="http://rdfs.org/sioc/ns#" xmlns:sioct="http://rdfs.org/sioc/types#" xmlns:skos="http://www.w3.org/2004/02/skos/core#" xmlns:xsd="http://www.w3.org/2001/XMLSchema#"> <head..."
Attribute “xmlns:sioc” not allowed here.
Line: 11 Column: 55 - 48
"... 1.1//EN"> <html lang="en" dir="ltr" version="HTML+RDFa 1.1" xmlns:content="http://purl.org/rss/1.0/modules/content/" xmlns:dc="http://purl.org/dc/terms/" xmlns:foaf="http://xmlns.com/foaf/0.1/" xmlns:og="http://ogp.me/ns#" xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#" xmlns:sioc="http://rdfs.org/sioc/ns#" xmlns:sioct="http://rdfs.org/sioc/types#" xmlns:skos="http://www.w3.org/2004/02/skos/core#" xmlns:xsd="http://www.w3.org/2001/XMLSchema#"> <head..."
"... 1.1//EN"> <html lang="en" dir="ltr" version="HTML+RDFa 1.1" xmlns:content="http://purl.org/rss/1.0/modules/content/" xmlns:dc="http://purl.org/dc/terms/" xmlns:foaf="http://xmlns.com/foaf/0.1/" xmlns:og="http://ogp.me/ns#" xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#" xmlns:sioc="http://rdfs.org/sioc/ns#" xmlns:sioct="http://rdfs.org/sioc/types#" xmlns:skos="http://www.w3.org/2004/02/skos/core#" xmlns:xsd="http://www.w3.org/2001/XMLSchema#"> <head..."
Attribute “xmlns:sioct” not allowed here.
Line: 11 Column: 55 - 48
"... 1.1//EN"> <html lang="en" dir="ltr" version="HTML+RDFa 1.1" xmlns:content="http://purl.org/rss/1.0/modules/content/" xmlns:dc="http://purl.org/dc/terms/" xmlns:foaf="http://xmlns.com/foaf/0.1/" xmlns:og="http://ogp.me/ns#" xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#" xmlns:sioc="http://rdfs.org/sioc/ns#" xmlns:sioct="http://rdfs.org/sioc/types#" xmlns:skos="http://www.w3.org/2004/02/skos/core#" xmlns:xsd="http://www.w3.org/2001/XMLSchema#"> <head..."
"... 1.1//EN"> <html lang="en" dir="ltr" version="HTML+RDFa 1.1" xmlns:content="http://purl.org/rss/1.0/modules/content/" xmlns:dc="http://purl.org/dc/terms/" xmlns:foaf="http://xmlns.com/foaf/0.1/" xmlns:og="http://ogp.me/ns#" xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#" xmlns:sioc="http://rdfs.org/sioc/ns#" xmlns:sioct="http://rdfs.org/sioc/types#" xmlns:skos="http://www.w3.org/2004/02/skos/core#" xmlns:xsd="http://www.w3.org/2001/XMLSchema#"> <head..."
Attribute “xmlns:skos” not allowed here.
Line: 11 Column: 55 - 48
"... 1.1//EN"> <html lang="en" dir="ltr" version="HTML+RDFa 1.1" xmlns:content="http://purl.org/rss/1.0/modules/content/" xmlns:dc="http://purl.org/dc/terms/" xmlns:foaf="http://xmlns.com/foaf/0.1/" xmlns:og="http://ogp.me/ns#" xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#" xmlns:sioc="http://rdfs.org/sioc/ns#" xmlns:sioct="http://rdfs.org/sioc/types#" xmlns:skos="http://www.w3.org/2004/02/skos/core#" xmlns:xsd="http://www.w3.org/2001/XMLSchema#"> <head..."
"... 1.1//EN"> <html lang="en" dir="ltr" version="HTML+RDFa 1.1" xmlns:content="http://purl.org/rss/1.0/modules/content/" xmlns:dc="http://purl.org/dc/terms/" xmlns:foaf="http://xmlns.com/foaf/0.1/" xmlns:og="http://ogp.me/ns#" xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#" xmlns:sioc="http://rdfs.org/sioc/ns#" xmlns:sioct="http://rdfs.org/sioc/types#" xmlns:skos="http://www.w3.org/2004/02/skos/core#" xmlns:xsd="http://www.w3.org/2001/XMLSchema#"> <head..."
Attribute “xmlns:xsd” not allowed here.
Line: 11 Column: 55 - 48
"... 1.1//EN"> <html lang="en" dir="ltr" version="HTML+RDFa 1.1" xmlns:content="http://purl.org/rss/1.0/modules/content/" xmlns:dc="http://purl.org/dc/terms/" xmlns:foaf="http://xmlns.com/foaf/0.1/" xmlns:og="http://ogp.me/ns#" xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#" xmlns:sioc="http://rdfs.org/sioc/ns#" xmlns:sioct="http://rdfs.org/sioc/types#" xmlns:skos="http://www.w3.org/2004/02/skos/core#" xmlns:xsd="http://www.w3.org/2001/XMLSchema#"> <head..."
"... 1.1//EN"> <html lang="en" dir="ltr" version="HTML+RDFa 1.1" xmlns:content="http://purl.org/rss/1.0/modules/content/" xmlns:dc="http://purl.org/dc/terms/" xmlns:foaf="http://xmlns.com/foaf/0.1/" xmlns:og="http://ogp.me/ns#" xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#" xmlns:sioc="http://rdfs.org/sioc/ns#" xmlns:sioct="http://rdfs.org/sioc/types#" xmlns:skos="http://www.w3.org/2004/02/skos/core#" xmlns:xsd="http://www.w3.org/2001/XMLSchema#"> <head..."
The “version” attribute on the “html” element is obsolete. You can safely omit it.
Line: 11 Column: 55 - 48
"... 1.1//EN"> <html lang="en" dir="ltr" version="HTML+RDFa 1.1" xmlns:content="http://purl.org/rss/1.0/modules/content/" xmlns:dc="http://purl.org/dc/terms/" xmlns:foaf="http://xmlns.com/foaf/0.1/" xmlns:og="http://ogp.me/ns#" xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#" xmlns:sioc="http://rdfs.org/sioc/ns#" xmlns:sioct="http://rdfs.org/sioc/types#" xmlns:skos="http://www.w3.org/2004/02/skos/core#" xmlns:xsd="http://www.w3.org/2001/XMLSchema#"> <head..."
"... 1.1//EN"> <html lang="en" dir="ltr" version="HTML+RDFa 1.1" xmlns:content="http://purl.org/rss/1.0/modules/content/" xmlns:dc="http://purl.org/dc/terms/" xmlns:foaf="http://xmlns.com/foaf/0.1/" xmlns:og="http://ogp.me/ns#" xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#" xmlns:sioc="http://rdfs.org/sioc/ns#" xmlns:sioct="http://rdfs.org/sioc/types#" xmlns:skos="http://www.w3.org/2004/02/skos/core#" xmlns:xsd="http://www.w3.org/2001/XMLSchema#"> <head..."
The “profile” attribute on the “head” element is obsolete. To declare which “meta” terms are used in the document, instead register the names as meta extensions. To trigger specific UA behaviors, use a “link” element instead.
Line: 12 Column: 49 - 51
"...LSchema#"> <head profile="http://www.w3.org/1999/xhtml/vocab"> <me..."
"...LSchema#"> <head profile="http://www.w3.org/1999/xhtml/vocab"> <me..."
Bad value “/en/staff/departments#research#research” for attribute “href” on element “a”: Illegal character in fragment: “#” is not allowed.
Line: 88 Column: 57 - 137
"...ts odd "><a href="/en/staff/departments#research#research" title="Research staff members">Resear..."
"...ts odd "><a href="/en/staff/departments#research#research" title="Research staff members">Resear..."
When the attribute “xml:lang” in no namespace is specified, the element must also have the attribute “lang” present with the same value.
Line: 201 Column: 80 - 129
"...rst last"><a href="/nl" class="language-link" xml:lang="nl">Nederl..."
"...rst last"><a href="/nl" class="language-link" xml:lang="nl">Nederl..."
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Line: 282 Column: 394 - 473
"...n> <img class="slideshow-overlay" src="/sites/all/themes/iisg/images/hook-red.png"> ..." Line: 303 Column: 351 - 433
"...n> <img class="slideshow-overlay" src="/sites/all/themes/iisg/images/hook-yellow.png"> ..." Line: 324 Column: 323 - 404
"...an> <img class="slideshow-overlay" src="/sites/all/themes/iisg/images/hook-blue.png"> ..." Line: 345 Column: 362 - 443
"...n> <img class="slideshow-overlay" src="/sites/all/themes/iisg/images/hook-brown.png"> ..." Line: 366 Column: 293 - 372
"...n> <img class="slideshow-overlay" src="/sites/all/themes/iisg/images/hook-red.png"> ..." Line: 590 Column: 387 - 442
"...t="blank"><img src="/sites/all/themes/iisg/images/facebook.png" /></a> ..." Line: 590 Column: 508 - 562
"...t="blank"><img src="/sites/all/themes/iisg/images/twitter.png" /></a> <..." Line: 590 Column: 850 - 903
"...t="blank"><img src="/sites/all/themes/iisg/images/flickr.png" /></a> ..." Line: 590 Column: 972 - 1027
"...t="blank"><img src="/sites/all/themes/iisg/images/linkedin.png" /></a> ..." Line: 590 Column: 1104 - 1159
"...t="blank"><img src="/sites/default/files/youtube-favicon_0.png" /></a> ..." Line: 590 Column: 1203 - 1253
"...t="blank"><img src="/sites/all/themes/iisg/images/rss.png" /></a></..."
"...n> <img class="slideshow-overlay" src="/sites/all/themes/iisg/images/hook-red.png"> ..." Line: 303 Column: 351 - 433
"...n> <img class="slideshow-overlay" src="/sites/all/themes/iisg/images/hook-yellow.png"> ..." Line: 324 Column: 323 - 404
"...an> <img class="slideshow-overlay" src="/sites/all/themes/iisg/images/hook-blue.png"> ..." Line: 345 Column: 362 - 443
"...n> <img class="slideshow-overlay" src="/sites/all/themes/iisg/images/hook-brown.png"> ..." Line: 366 Column: 293 - 372
"...n> <img class="slideshow-overlay" src="/sites/all/themes/iisg/images/hook-red.png"> ..." Line: 590 Column: 387 - 442
"...t="blank"><img src="/sites/all/themes/iisg/images/facebook.png" /></a> ..." Line: 590 Column: 508 - 562
"...t="blank"><img src="/sites/all/themes/iisg/images/twitter.png" /></a> <..." Line: 590 Column: 850 - 903
"...t="blank"><img src="/sites/all/themes/iisg/images/flickr.png" /></a> ..." Line: 590 Column: 972 - 1027
"...t="blank"><img src="/sites/all/themes/iisg/images/linkedin.png" /></a> ..." Line: 590 Column: 1104 - 1159
"...t="blank"><img src="/sites/default/files/youtube-favicon_0.png" /></a> ..." Line: 590 Column: 1203 - 1253
"...t="blank"><img src="/sites/all/themes/iisg/images/rss.png" /></a></..."
Element “p” not allowed as child of element “span” in this context. (Suppressing further errors from this subtree.)
Line: 328 Column: 64 - 66
"...-content"><p>What d..." Line: 349 Column: 64 - 66
"...-content"><p>Leo Lu..." Line: 370 Column: 64 - 66
"...-content"><p>Almost..."
"...-content"><p>What d..." Line: 349 Column: 64 - 66
"...-content"><p>Leo Lu..." Line: 370 Column: 64 - 66
"...-content"><p>Almost..."
Attribute “datatype” not allowed on element “span” at this point.
Line: 515 Column: 163 - 275
"...euw"><div><span class="date-display-single" property="dc:date" datatype="xsd:dateTime" content="2018-07-06T00:00:00+02:00">6 July..." Line: 519 Column: 139 - 251
"...ijt"><div><span class="date-display-single" property="dc:date" datatype="xsd:dateTime" content="2018-09-04T00:00:00+02:00">4 Sept..." Line: 523 Column: 137 - 249
"...cfp"><div><span class="date-display-single" property="dc:date" datatype="xsd:dateTime" content="2018-11-09T00:00:00+01:00">9 Nove..." Line: 527 Column: 193 - 304
"...ay-range"><span class="date-display-start" property="dc:date" datatype="xsd:dateTime" content="2019-05-09T00:00:00+02:00">9 May ..." Line: 527 Column: 326 - 435
".../span> to <span class="date-display-end" property="dc:date" datatype="xsd:dateTime" content="2019-05-11T00:00:00+02:00">11 May..." Line: 551 Column: 93 - 205
"...-content"><span class="date-display-single" property="dc:date" datatype="xsd:dateTime" content="1839-07-02T00:00:00+00:19">2 July..."
"...euw"><div><span class="date-display-single" property="dc:date" datatype="xsd:dateTime" content="2018-07-06T00:00:00+02:00">6 July..." Line: 519 Column: 139 - 251
"...ijt"><div><span class="date-display-single" property="dc:date" datatype="xsd:dateTime" content="2018-09-04T00:00:00+02:00">4 Sept..." Line: 523 Column: 137 - 249
"...cfp"><div><span class="date-display-single" property="dc:date" datatype="xsd:dateTime" content="2018-11-09T00:00:00+01:00">9 Nove..." Line: 527 Column: 193 - 304
"...ay-range"><span class="date-display-start" property="dc:date" datatype="xsd:dateTime" content="2019-05-09T00:00:00+02:00">9 May ..." Line: 527 Column: 326 - 435
".../span> to <span class="date-display-end" property="dc:date" datatype="xsd:dateTime" content="2019-05-11T00:00:00+02:00">11 May..." Line: 551 Column: 93 - 205
"...-content"><span class="date-display-single" property="dc:date" datatype="xsd:dateTime" content="1839-07-02T00:00:00+00:19">2 July..."
Attribute “content” not allowed on element “span” at this point.
Line: 515 Column: 163 - 275
"...euw"><div><span class="date-display-single" property="dc:date" datatype="xsd:dateTime" content="2018-07-06T00:00:00+02:00">6 July..." Line: 519 Column: 139 - 251
"...ijt"><div><span class="date-display-single" property="dc:date" datatype="xsd:dateTime" content="2018-09-04T00:00:00+02:00">4 Sept..." Line: 523 Column: 137 - 249
"...cfp"><div><span class="date-display-single" property="dc:date" datatype="xsd:dateTime" content="2018-11-09T00:00:00+01:00">9 Nove..." Line: 527 Column: 193 - 304
"...ay-range"><span class="date-display-start" property="dc:date" datatype="xsd:dateTime" content="2019-05-09T00:00:00+02:00">9 May ..." Line: 527 Column: 326 - 435
".../span> to <span class="date-display-end" property="dc:date" datatype="xsd:dateTime" content="2019-05-11T00:00:00+02:00">11 May..." Line: 551 Column: 93 - 205
"...-content"><span class="date-display-single" property="dc:date" datatype="xsd:dateTime" content="1839-07-02T00:00:00+00:19">2 July..."
"...euw"><div><span class="date-display-single" property="dc:date" datatype="xsd:dateTime" content="2018-07-06T00:00:00+02:00">6 July..." Line: 519 Column: 139 - 251
"...ijt"><div><span class="date-display-single" property="dc:date" datatype="xsd:dateTime" content="2018-09-04T00:00:00+02:00">4 Sept..." Line: 523 Column: 137 - 249
"...cfp"><div><span class="date-display-single" property="dc:date" datatype="xsd:dateTime" content="2018-11-09T00:00:00+01:00">9 Nove..." Line: 527 Column: 193 - 304
"...ay-range"><span class="date-display-start" property="dc:date" datatype="xsd:dateTime" content="2019-05-09T00:00:00+02:00">9 May ..." Line: 527 Column: 326 - 435
".../span> to <span class="date-display-end" property="dc:date" datatype="xsd:dateTime" content="2019-05-11T00:00:00+02:00">11 May..." Line: 551 Column: 93 - 205
"...-content"><span class="date-display-single" property="dc:date" datatype="xsd:dateTime" content="1839-07-02T00:00:00+00:19">2 July..."
The “for” attribute of the “label” element must refer to a non-hidden form control.
Line: 219 Column: 3 - 66
"...paths"> <label class="element-invisible" for="edit-custom-search-paths">Custom..."
"...paths"> <label class="element-invisible" for="edit-custom-search-paths">Custom..."
Warnings
Attribute with the local name “xmlns:content” is not serializable as XML 1.0.
Line: 11 Column: 55 - 48
"... 1.1//EN"> <html lang="en" dir="ltr" version="HTML+RDFa 1.1" xmlns:content="http://purl.org/rss/1.0/modules/content/" xmlns:dc="http://purl.org/dc/terms/" xmlns:foaf="http://xmlns.com/foaf/0.1/" xmlns:og="http://ogp.me/ns#" xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#" xmlns:sioc="http://rdfs.org/sioc/ns#" xmlns:sioct="http://rdfs.org/sioc/types#" xmlns:skos="http://www.w3.org/2004/02/skos/core#" xmlns:xsd="http://www.w3.org/2001/XMLSchema#"> <head..."
"... 1.1//EN"> <html lang="en" dir="ltr" version="HTML+RDFa 1.1" xmlns:content="http://purl.org/rss/1.0/modules/content/" xmlns:dc="http://purl.org/dc/terms/" xmlns:foaf="http://xmlns.com/foaf/0.1/" xmlns:og="http://ogp.me/ns#" xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#" xmlns:sioc="http://rdfs.org/sioc/ns#" xmlns:sioct="http://rdfs.org/sioc/types#" xmlns:skos="http://www.w3.org/2004/02/skos/core#" xmlns:xsd="http://www.w3.org/2001/XMLSchema#"> <head..."
Attribute with the local name “xmlns:dc” is not serializable as XML 1.0.
Line: 11 Column: 55 - 48
"... 1.1//EN"> <html lang="en" dir="ltr" version="HTML+RDFa 1.1" xmlns:content="http://purl.org/rss/1.0/modules/content/" xmlns:dc="http://purl.org/dc/terms/" xmlns:foaf="http://xmlns.com/foaf/0.1/" xmlns:og="http://ogp.me/ns#" xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#" xmlns:sioc="http://rdfs.org/sioc/ns#" xmlns:sioct="http://rdfs.org/sioc/types#" xmlns:skos="http://www.w3.org/2004/02/skos/core#" xmlns:xsd="http://www.w3.org/2001/XMLSchema#"> <head..."
"... 1.1//EN"> <html lang="en" dir="ltr" version="HTML+RDFa 1.1" xmlns:content="http://purl.org/rss/1.0/modules/content/" xmlns:dc="http://purl.org/dc/terms/" xmlns:foaf="http://xmlns.com/foaf/0.1/" xmlns:og="http://ogp.me/ns#" xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#" xmlns:sioc="http://rdfs.org/sioc/ns#" xmlns:sioct="http://rdfs.org/sioc/types#" xmlns:skos="http://www.w3.org/2004/02/skos/core#" xmlns:xsd="http://www.w3.org/2001/XMLSchema#"> <head..."
Attribute with the local name “xmlns:foaf” is not serializable as XML 1.0.
Line: 11 Column: 55 - 48
"... 1.1//EN"> <html lang="en" dir="ltr" version="HTML+RDFa 1.1" xmlns:content="http://purl.org/rss/1.0/modules/content/" xmlns:dc="http://purl.org/dc/terms/" xmlns:foaf="http://xmlns.com/foaf/0.1/" xmlns:og="http://ogp.me/ns#" xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#" xmlns:sioc="http://rdfs.org/sioc/ns#" xmlns:sioct="http://rdfs.org/sioc/types#" xmlns:skos="http://www.w3.org/2004/02/skos/core#" xmlns:xsd="http://www.w3.org/2001/XMLSchema#"> <head..."
"... 1.1//EN"> <html lang="en" dir="ltr" version="HTML+RDFa 1.1" xmlns:content="http://purl.org/rss/1.0/modules/content/" xmlns:dc="http://purl.org/dc/terms/" xmlns:foaf="http://xmlns.com/foaf/0.1/" xmlns:og="http://ogp.me/ns#" xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#" xmlns:sioc="http://rdfs.org/sioc/ns#" xmlns:sioct="http://rdfs.org/sioc/types#" xmlns:skos="http://www.w3.org/2004/02/skos/core#" xmlns:xsd="http://www.w3.org/2001/XMLSchema#"> <head..."
Attribute with the local name “xmlns:og” is not serializable as XML 1.0.
Line: 11 Column: 55 - 48
"... 1.1//EN"> <html lang="en" dir="ltr" version="HTML+RDFa 1.1" xmlns:content="http://purl.org/rss/1.0/modules/content/" xmlns:dc="http://purl.org/dc/terms/" xmlns:foaf="http://xmlns.com/foaf/0.1/" xmlns:og="http://ogp.me/ns#" xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#" xmlns:sioc="http://rdfs.org/sioc/ns#" xmlns:sioct="http://rdfs.org/sioc/types#" xmlns:skos="http://www.w3.org/2004/02/skos/core#" xmlns:xsd="http://www.w3.org/2001/XMLSchema#"> <head..."
"... 1.1//EN"> <html lang="en" dir="ltr" version="HTML+RDFa 1.1" xmlns:content="http://purl.org/rss/1.0/modules/content/" xmlns:dc="http://purl.org/dc/terms/" xmlns:foaf="http://xmlns.com/foaf/0.1/" xmlns:og="http://ogp.me/ns#" xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#" xmlns:sioc="http://rdfs.org/sioc/ns#" xmlns:sioct="http://rdfs.org/sioc/types#" xmlns:skos="http://www.w3.org/2004/02/skos/core#" xmlns:xsd="http://www.w3.org/2001/XMLSchema#"> <head..."
Attribute with the local name “xmlns:rdfs” is not serializable as XML 1.0.
Line: 11 Column: 55 - 48
"... 1.1//EN"> <html lang="en" dir="ltr" version="HTML+RDFa 1.1" xmlns:content="http://purl.org/rss/1.0/modules/content/" xmlns:dc="http://purl.org/dc/terms/" xmlns:foaf="http://xmlns.com/foaf/0.1/" xmlns:og="http://ogp.me/ns#" xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#" xmlns:sioc="http://rdfs.org/sioc/ns#" xmlns:sioct="http://rdfs.org/sioc/types#" xmlns:skos="http://www.w3.org/2004/02/skos/core#" xmlns:xsd="http://www.w3.org/2001/XMLSchema#"> <head..."
"... 1.1//EN"> <html lang="en" dir="ltr" version="HTML+RDFa 1.1" xmlns:content="http://purl.org/rss/1.0/modules/content/" xmlns:dc="http://purl.org/dc/terms/" xmlns:foaf="http://xmlns.com/foaf/0.1/" xmlns:og="http://ogp.me/ns#" xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#" xmlns:sioc="http://rdfs.org/sioc/ns#" xmlns:sioct="http://rdfs.org/sioc/types#" xmlns:skos="http://www.w3.org/2004/02/skos/core#" xmlns:xsd="http://www.w3.org/2001/XMLSchema#"> <head..."
Attribute with the local name “xmlns:sioc” is not serializable as XML 1.0.
Line: 11 Column: 55 - 48
"... 1.1//EN"> <html lang="en" dir="ltr" version="HTML+RDFa 1.1" xmlns:content="http://purl.org/rss/1.0/modules/content/" xmlns:dc="http://purl.org/dc/terms/" xmlns:foaf="http://xmlns.com/foaf/0.1/" xmlns:og="http://ogp.me/ns#" xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#" xmlns:sioc="http://rdfs.org/sioc/ns#" xmlns:sioct="http://rdfs.org/sioc/types#" xmlns:skos="http://www.w3.org/2004/02/skos/core#" xmlns:xsd="http://www.w3.org/2001/XMLSchema#"> <head..."
"... 1.1//EN"> <html lang="en" dir="ltr" version="HTML+RDFa 1.1" xmlns:content="http://purl.org/rss/1.0/modules/content/" xmlns:dc="http://purl.org/dc/terms/" xmlns:foaf="http://xmlns.com/foaf/0.1/" xmlns:og="http://ogp.me/ns#" xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#" xmlns:sioc="http://rdfs.org/sioc/ns#" xmlns:sioct="http://rdfs.org/sioc/types#" xmlns:skos="http://www.w3.org/2004/02/skos/core#" xmlns:xsd="http://www.w3.org/2001/XMLSchema#"> <head..."
Attribute with the local name “xmlns:sioct” is not serializable as XML 1.0.
Line: 11 Column: 55 - 48
"... 1.1//EN"> <html lang="en" dir="ltr" version="HTML+RDFa 1.1" xmlns:content="http://purl.org/rss/1.0/modules/content/" xmlns:dc="http://purl.org/dc/terms/" xmlns:foaf="http://xmlns.com/foaf/0.1/" xmlns:og="http://ogp.me/ns#" xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#" xmlns:sioc="http://rdfs.org/sioc/ns#" xmlns:sioct="http://rdfs.org/sioc/types#" xmlns:skos="http://www.w3.org/2004/02/skos/core#" xmlns:xsd="http://www.w3.org/2001/XMLSchema#"> <head..."
"... 1.1//EN"> <html lang="en" dir="ltr" version="HTML+RDFa 1.1" xmlns:content="http://purl.org/rss/1.0/modules/content/" xmlns:dc="http://purl.org/dc/terms/" xmlns:foaf="http://xmlns.com/foaf/0.1/" xmlns:og="http://ogp.me/ns#" xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#" xmlns:sioc="http://rdfs.org/sioc/ns#" xmlns:sioct="http://rdfs.org/sioc/types#" xmlns:skos="http://www.w3.org/2004/02/skos/core#" xmlns:xsd="http://www.w3.org/2001/XMLSchema#"> <head..."
Attribute with the local name “xmlns:skos” is not serializable as XML 1.0.
Line: 11 Column: 55 - 48
"... 1.1//EN"> <html lang="en" dir="ltr" version="HTML+RDFa 1.1" xmlns:content="http://purl.org/rss/1.0/modules/content/" xmlns:dc="http://purl.org/dc/terms/" xmlns:foaf="http://xmlns.com/foaf/0.1/" xmlns:og="http://ogp.me/ns#" xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#" xmlns:sioc="http://rdfs.org/sioc/ns#" xmlns:sioct="http://rdfs.org/sioc/types#" xmlns:skos="http://www.w3.org/2004/02/skos/core#" xmlns:xsd="http://www.w3.org/2001/XMLSchema#"> <head..."
"... 1.1//EN"> <html lang="en" dir="ltr" version="HTML+RDFa 1.1" xmlns:content="http://purl.org/rss/1.0/modules/content/" xmlns:dc="http://purl.org/dc/terms/" xmlns:foaf="http://xmlns.com/foaf/0.1/" xmlns:og="http://ogp.me/ns#" xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#" xmlns:sioc="http://rdfs.org/sioc/ns#" xmlns:sioct="http://rdfs.org/sioc/types#" xmlns:skos="http://www.w3.org/2004/02/skos/core#" xmlns:xsd="http://www.w3.org/2001/XMLSchema#"> <head..."
Attribute with the local name “xmlns:xsd” is not serializable as XML 1.0.
Line: 11 Column: 55 - 48
"... 1.1//EN"> <html lang="en" dir="ltr" version="HTML+RDFa 1.1" xmlns:content="http://purl.org/rss/1.0/modules/content/" xmlns:dc="http://purl.org/dc/terms/" xmlns:foaf="http://xmlns.com/foaf/0.1/" xmlns:og="http://ogp.me/ns#" xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#" xmlns:sioc="http://rdfs.org/sioc/ns#" xmlns:sioct="http://rdfs.org/sioc/types#" xmlns:skos="http://www.w3.org/2004/02/skos/core#" xmlns:xsd="http://www.w3.org/2001/XMLSchema#"> <head..."
"... 1.1//EN"> <html lang="en" dir="ltr" version="HTML+RDFa 1.1" xmlns:content="http://purl.org/rss/1.0/modules/content/" xmlns:dc="http://purl.org/dc/terms/" xmlns:foaf="http://xmlns.com/foaf/0.1/" xmlns:og="http://ogp.me/ns#" xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#" xmlns:sioc="http://rdfs.org/sioc/ns#" xmlns:sioct="http://rdfs.org/sioc/types#" xmlns:skos="http://www.w3.org/2004/02/skos/core#" xmlns:xsd="http://www.w3.org/2001/XMLSchema#"> <head..."
Empty heading.
Line: 67 Column: 25 - 46
"... <h1 class="site-name"><a hre..."
"... <h1 class="site-name"><a hre..."
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
Line: 207 Column: 7 - 68
"... <section id="section-content" class="section section-content"> <di..."
"... <section id="section-content" class="section section-content"> <di..."
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iisg.nl Ping
Ping is a computer network administration software utility used to test the reachability of a host on an Internet Protocol (IP) network. It measures the round-trip time for messages sent from the originating host to a destination computer that are echoed back to the source.
iisg.nl TRACEROUTE
Traceroute is a computer network diagnostic tool for displaying the route (path) and measuring transit delays of packets across an Internet Protocol (IP) network. The history of the route is recorded as the round-trip times of the packets received from each successive host (remote node) in the route (path); the sum of the mean times in each hop is a measure of the total time spent to establish the connection. Traceroute proceeds unless all (three) sent packets are lost more than twice, then the connection is lost and the route cannot be evaluated.