onlamp.com Website Information

Daily Unique Visits: 1,285,963

Daily Page Views: 10,287,704

Income Per Day: $10,288

Estimated Value: $11,111,040

This website is located in United States and is using following IP address 199.27.145.64. See the complete list of popular websites hosted in United States.

onlamp.com is registered under .COM top-level domain. Please check other sites in .COM zone.

Website onlamp.com is using the following name servers:

a13-64.akam.net
a1-225.akam.net
a3-67.akam.net
a4-64.akam.net
a20-66.akam.net
a16-65.akam.net

and is probably hosted by GOOGLE-PRIVATE-CLOUD - Google LLC, US. See the full list of other websites hosted by GOOGLE-PRIVATE-CLOUD - Google LLC, US.

The highest website onlamp.com position in Alexa rank database was 1131 and the lowest rank position was 876059. Current position of onlamp.com in Alexa rank database is 1185.

Desktop speed score of onlamp.com (69/100) is better than the results of 49.24% of other sites and shows that the page desktop performance can be improved.

Mobile usability score of onlamp.com (63/100) is better than the results of 9.16% of other sites and means that the page is not mobile-friendly.

Mobile speed score of onlamp.com (58/100) is better than the results of 50.23% of other sites and shows that the landing page performance on mobile devices is poor and can be improved.

onlamp.com 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.

onlamp.com 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: ONLAMP.COM
Registry Domain ID: 48667357_DOMAIN_COM-VRSN
Registrar WHOIS Server: whois.godaddy.com
Registrar URL: http://www.godaddy.com
Updated Date: 2020-11-20T17:13:21Z
Creation Date: 2000-12-15T19:00:15Z
Registry Expiry Date: 2021-12-15T19:00:15Z
Registrar: GoDaddy.com, LLC
Registrar IANA ID: 146
Registrar Abuse Contact Email: abuse@godaddy.com
Registrar Abuse Contact Phone: 480-624-2505
Domain Status: clientDeleteProhibited https://icann.org/epp#clientDeleteProhibited
Domain Status: clientRenewProhibited https://icann.org/epp#clientRenewProhibited
Domain Status: clientTransferProhibited https://icann.org/epp#clientTransferProhibited
Domain Status: clientUpdateProhibited https://icann.org/epp#clientUpdateProhibited
Name Server: A1-225.AKAM.NET
Name Server: A13-64.AKAM.NET
Name Server: A16-65.AKAM.NET
Name Server: A20-66.AKAM.NET
Name Server: A3-67.AKAM.NET
Name Server: A4-64.AKAM.NET
DNSSEC: unsigned
URL of the ICANN Whois Inaccuracy Complaint Form: https://www.icann.org/wicf/
>>> Last update of whois database: 2021-05-04T11:39:56Z

onlamp.com server information

Servers Location

onlamp.com desktop page speed rank

Last tested: 2016-11-22

Desktop Speed Medium

69/100

onlamp.com Desktop Speed Test Quick Summary

priority - 22Optimize images

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Compressing http://www.onlamp.com/images/onlamp/onlamp-logo.gif could save 824B (25% reduction).

priority - 10Eliminate render-blocking JavaScript and CSS in above-the-fold content

Your page has 7 blocking script resources and 6 blocking CSS resources. This causes a delay in rendering your page.

Remove render-blocking JavaScript:

http://content.atomz.com/static/ac/1.0/autocomplete.js
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priority - 8Enable compression

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priority - 5Leverage 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:

http://content.atomz.com/sp10049ed9/publish/autocomplete_data.js (expiration not specified)
http://content.atomz.com/sp10049ed9/publish/autocomplete_styles.css (expiration not specified)
http://t.p.mybuys.com/css/mbstyles.css (4 hours)
http://www.onlamp.com/images/ads/advertisement.gif (4.5 hours)
http://t.p.mybuys.com/clients/OREILLY/js/setup.js (5.1 hours)
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http://www.onlamp.com/images/oreilly/safaribooksonline_gray.gif (14 hours)
http://www.onlamp.com/images/tabs/conf_gray.gif (14 hours)
http://www.onlamp.com/images/tabs/ora_gray.gif (14.1 hours)
http://www.onlamp.com/images/trans.gif (23.5 hours)
http://www.onlamp.com/images/box-item-header.gif (23.5 hours)
http://www.onlamp.com/images/onlamp/onlamp-logo.gif (24 hours)
http://www.onlamp.com/styles/main.css (2.1 days)

priority - 0Minify CSS

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priority - 0Minify JavaScript

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priority - 0Minify HTML

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Minifying http://www.onlamp.com/ could save 1.1KiB (14% reduction) after compression.

onlamp.com Desktop Resource Breakdown

Total Resources	51
Number of Hosts	20
Static Resources	27
JavaScript Resources	16
CSS Resources	5

onlamp.com mobile page speed rank

Last tested: 2016-11-22

Mobile Speed Bad

58/100

onlamp.com Mobile Speed Test Quick Summary

priority - 40Eliminate render-blocking JavaScript and CSS in above-the-fold content

Your page has 7 blocking script resources and 6 blocking CSS resources. This causes a delay in rendering your page.

Remove render-blocking JavaScript:

http://content.atomz.com/static/ac/1.0/autocomplete.js
http://www.onlamp.com/common.js
http://cdn.oreillystatic.com/assets/js/s_code.js
http://t.p.mybuys.com/js/mybuys3.js
http://t.p.mybuys.com/clients/OREILLY/js/setup.js
http://adserver.adtechus.com/addyn/3.0/5159/425849…up];misc=1479805377899
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Optimize CSS Delivery of the following:

priority - 22Optimize images

Properly formatting and compressing images can save many bytes of data.

Optimize the following images to reduce their size by 211.9KiB (95% reduction).

priority - 8Leverage 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:

http://content.atomz.com/sp10049ed9/publish/autocomplete_data.js (expiration not specified)
http://content.atomz.com/sp10049ed9/publish/autocomplete_styles.css (expiration not specified)
http://www.onlamp.com/images/onlamp/onlamp-logo.gif (38.6 minutes)
http://www.onlamp.com/images/tabs/ora_gray.gif (38.7 minutes)
http://www.onlamp.com/images/oreilly/safaribooksonline_gray.gif (40 minutes)
http://www.onlamp.com/images/box-item-header.gif (40.2 minutes)
http://www.onlamp.com/images/ads/advertisement.gif (4.5 hours)
http://t.p.mybuys.com/css/mbstyles.css (4.7 hours)
http://t.p.mybuys.com/clients/OREILLY/js/setup.js (5.1 hours)
http://t.p.mybuys.com/js/mybuys3.js (6 hours)
http://www.onlamp.com/images/trans.gif (23.5 hours)
http://www.onlamp.com/images/tabs/conf_gray.gif (23.5 hours)
http://www.onlamp.com/styles/main.css (2.1 days)

priority - 8Enable compression

Compressing resources with gzip or deflate can reduce the number of bytes sent over the network.

Enable compression for the following resources to reduce their transfer size by 75KiB (72% reduction).

priority - 0Minify CSS

Compacting CSS code can save many bytes of data and speed up download and parse times.

Minify CSS for the following resources to reduce their size by 4.3KiB (21% reduction).

priority - 0Minify JavaScript

Compacting JavaScript code can save many bytes of data and speed up downloading, parsing, and execution time.

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Minifying http://www.google-analytics.com/urchin.js could save 975B (15% reduction) after compression.
Minifying http://www.onlamp.com/common.js could save 576B (27% reduction) after compression.

priority - 0Minify HTML

Compacting HTML code, including any inline JavaScript and CSS contained in it, can save many bytes of data and speed up download and parse times.

Minify HTML for the following resources to reduce their size by 1.1KiB (14% reduction).

Minifying http://www.onlamp.com/ could save 1.1KiB (14% reduction) after compression.

onlamp.com Mobile Resource Breakdown

Total Resources	51
Number of Hosts	19
Static Resources	27
JavaScript Resources	16
CSS Resources	5

onlamp.com mobile page usability

Last tested: 2016-11-22

Mobile Usability Bad

63/100

onlamp.com Mobile Usability Test Quick Summary

priority - 40Use legible font sizes

The following text on your page renders in a way that may be difficult for some of your visitors to read. Use legible font sizes to provide a better user experience.

The following text fragments have a small font size. Increase the font size to make them more legible.

ONLamp Subjects and 2 others render only 4 pixels tall (11 CSS pixels).

App Development and 14 others render only 4 pixels tall (11 CSS pixels).

News renders only 7 pixels tall (17 CSS pixels).

Puerto Rico Py…st Anniversary and 19 others render only 5 pixels tall (14 CSS pixels).

by Nat Torkington and 19 others render only 5 pixels tall (12 CSS pixels).

ArangoDB — ope…of creating … and 19 others render only 5 pixels tall (12 CSS pixels).

Valuable Onlin…ation Training renders only 5 pixels tall (14 CSS pixels).

— The PHP/SQL…ySQL platform. and 3 others render only 5 pixels tall (12 CSS pixels).

University of…uing Education renders only 5 pixels tall (12 CSS pixels).

Linux/Unix Sys…ificate Series and 2 others render only 5 pixels tall (12 CSS pixels).

Recommended for You renders only 4 pixels tall (11 CSS pixels).

Production-Ready Microservices and 2 others render only 4 pixels tall (11 CSS pixels).

Ebook: and 5 others render only 4 pixels tall (11 CSS pixels).

© 2014, O’Reilly Media, Inc. renders only 5 pixels tall (12 CSS pixels).
(707) 827-7019 and 1 others render only 5 pixels tall (12 CSS pixels).
All trademarks…ective owners. renders only 5 pixels tall (12 CSS pixels).
About O'Reilly and 3 others render only 5 pixels tall (12 CSS pixels).
O'Reilly Insig…on Forbes.com and 26 others render only 5 pixels tall (12 CSS pixels).

priority - 12Size 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 <a href="http://www.oreilly.com/"></a> and 2 others are close to other tap targets.

The tap target <a href="/pub/q/all_onlamp_articles" class="nav3">All Articles</a> and 14 others are close to other tap targets.

The tap target <a href="http://shop.or…36920050896.IP" class="mbnamelink">Python for Data Analysis</a> and 4 others are close to other tap targets.

The tap target <a href="http://shop.or…36920050896.IP" class="mbpricelinklabel">Ebook:</a> and 5 others are close to other tap targets.

The tap target <a href="http://oreilly.com/academic/" class="footer">Academic Solutions</a> and 26 others are close to other tap targets.

priority - 10Configure the viewport

Your page does not have a viewport specified. This causes mobile devices to render your page as it would appear on a desktop browser, scaling it down to fit on a mobile screen. Configure a viewport to allow your page to render properly on all devices.

onlamp.com HTML validation

Errors

Almost standards mode doctype. Expected “<!DOCTYPE html>”.

Line: 2 Column: 1 - 42
"...<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <htm..."

Element “title” not allowed as child of element “head” in this context. (Suppressing further errors from this subtree.)

Line: 7 Column: 2 - 8
"...</title> <title>O'Reil..."

Element “noindex” not allowed as child of element “body” in this context. (Suppressing further errors from this subtree.)

Line: 63 Column: 1 - 9
"... body --> <noindex> <tabl..."

The “width” attribute on the “table” element is obsolete. Use CSS instead.

Line: 64 Column: 1 - 63
"...<noindex> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> ..." Line: 66 Column: 43 - 94
"...t logo --><table width="100%" cellspacing="0" cellpadding="0"> <tr> ..." Line: 75 Column: 1 - 63
"...></table> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> ..." Line: 116 Column: 1 - 63
".../noindex> <table width="100%" cellspacing="0" cellpadding="0" border="0"> <tr> ..." Line: 121 Column: 1 - 80
"...avbar --> <table width="160" border="0" cellpadding="0" cellspacing="0" bgcolor="#000000"> <tr> ..." Line: 197 Column: 1 - 21
"... feed --> <table width="100%" > <tr v..." Line: 205 Column: 7 - 27
"...le> <br /><table width="100%" > <tr v..." Line: 213 Column: 7 - 27
"...le> <br /><table width="100%" > <tr v..." Line: 221 Column: 7 - 27
"...le> <br /><table width="100%" > <tr v..." Line: 229 Column: 7 - 27
"...le> <br /><table width="100%" > <tr v..." Line: 237 Column: 7 - 27
"...le> <br /><table width="100%" > <tr v..." Line: 245 Column: 7 - 27
"...le> <br /><table width="100%" > <tr v..." Line: 253 Column: 7 - 27
"...le> <br /><table width="100%" > <tr v..." Line: 261 Column: 7 - 27
"...le> <br /><table width="100%" > <tr v..." Line: 269 Column: 7 - 27
"...le> <br /><table width="100%" > <tr v..." Line: 277 Column: 7 - 27
"...le> <br /><table width="100%" > <tr v..." Line: 285 Column: 7 - 27
"...le> <br /><table width="100%" > <tr v..." Line: 293 Column: 7 - 27
"...le> <br /><table width="100%" > <tr v..." Line: 301 Column: 7 - 27
"...le> <br /><table width="100%" > <tr v..." Line: 309 Column: 7 - 27
"...le> <br /><table width="100%" > <tr v..." Line: 317 Column: 7 - 27
"...le> <br /><table width="100%" > <tr v..." Line: 325 Column: 7 - 27
"...le> <br /><table width="100%" > <tr v..." Line: 333 Column: 7 - 27
"...le> <br /><table width="100%" > <tr v..." Line: 341 Column: 7 - 27
"...le> <br /><table width="100%" > <tr v..." Line: 349 Column: 7 - 27
"...le> <br /><table width="100%" > <tr v..." Line: 376 Column: 1 - 64
"...o ### --> <table width="170px" border="0" cellspacing="0" cellpadding="4"> <tr> ..." Line: 397 Column: 1 - 64
"...code --> <table width="170px" border="0" cellspacing="0" cellpadding="4"> <tr> ..." Line: 447 Column: 1 - 64
"... </table> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> ..."

The “cellspacing” attribute on the “table” element is obsolete. Use CSS instead.

The “cellpadding” attribute on the “table” element is obsolete. Use CSS instead.

The “border” attribute on the “table” element is obsolete. Use CSS instead.

Line: 64 Column: 1 - 63
"...<noindex> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> ..." Line: 75 Column: 1 - 63
"...></table> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> ..." Line: 116 Column: 1 - 63
".../noindex> <table width="100%" cellspacing="0" cellpadding="0" border="0"> <tr> ..." Line: 121 Column: 1 - 80
"...avbar --> <table width="160" border="0" cellpadding="0" cellspacing="0" bgcolor="#000000"> <tr> ..." Line: 376 Column: 1 - 64
"...o ### --> <table width="170px" border="0" cellspacing="0" cellpadding="4"> <tr> ..." Line: 397 Column: 1 - 64
"...code --> <table width="170px" border="0" cellspacing="0" cellpadding="4"> <tr> ..." Line: 447 Column: 1 - 64
"... </table> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> ..."

The “valign” attribute on the “td” element is obsolete. Use CSS instead.

Line: 66 Column: 5 - 20
"...="0"> <tr> <td valign="bottom"><!-- t..." Line: 68 Column: 5 - 33
"...="0"> <tr> <td align="left" valign="bottom"> <!-- ..." Line: 77 Column: 5 - 29
"...="0"> <tr> <td colspan="2" valign="top"> <!-- ..." Line: 118 Column: 5 - 96
"...="0"> <tr> <td width="160" rowspan="3" valign="top" bgcolor="#000000" style="border-left: 1px #FFF solid;"> <noin..." Line: 126 Column: 5 - 46
"...</tr> <tr> <td valign="top" bgcolor="#000000" width="10"><img s..." Line: 127 Column: 124 - 59
"...0" /></td> <td valign="top" bcolor="#000000" width="150" class="nav3"> <!-- ..." Line: 172 Column: 78 - 30
"...0" /></td> <td width="100%" valign="top"> <img ..." Line: 374 Column: 77 - 31
"...0" /></td> <td width="170px" valign="top"> <!-- ..." Line: 428 Column: 6 - 28
"... /> </td> <td width="10" valign="top"><!-- s..." Line: 430 Column: 78 - 133
"...0" /></td> <td width="160" bgcolor="#efefef" valign="top" align="center" class="secondary" style="border-right: 1px #FFF solid; padding: 10px;"> <!-- ..."

The “align” attribute on the “td” element is obsolete. Use CSS instead.

Line: 68 Column: 5 - 33
"...="0"> <tr> <td align="left" valign="bottom">  <tr> <td colspan="2" align="center" bgcolor="#efefef" style="padding: 6px;"> <!--J..." Line: 430 Column: 78 - 133
"...0" /></td> <td width="160" bgcolor="#efefef" valign="top" align="center" class="secondary" style="border-right: 1px #FFF solid; padding: 10px;"> <!-- ..."

The “hspace” attribute on the “img” element is obsolete. Use CSS instead.

The “vspace” attribute on the “img” element is obsolete. Use CSS instead.

The “align” attribute on the “input” element is obsolete. Use CSS instead.

Line: 93 Column: 38 - 194
"...h-button"><input value="SEARCH" src="http://cdn.oreillystatic.com/images/oreilly/large-search.png" style="float:left" alt="search" align="top" border="0" type="image"></span..."

The “bgcolor” attribute on the “td” element is obsolete. Use CSS instead.

Line: 103 Column: 5 - 71
"...0 --> <tr> <td colspan="2" align="center" bgcolor="#efefef" style="padding: 6px;"> <!--J..." Line: 118 Column: 5 - 96
"...="0"> <tr> <td width="160" rowspan="3" valign="top" bgcolor="#000000" style="border-left: 1px #FFF solid;"> <noin..." Line: 123 Column: 5 - 34
"...000"> <tr> <td colspan="2" bgcolor="#000000"><img s..." Line: 126 Column: 5 - 46
"...</tr> <tr> <td valign="top" bgcolor="#000000" width="10"><img s..." Line: 367 Column: 6 - 32
"..." /> </td> <td width="5" bgcolor="#ffffff"><!-- s..." Line: 369 Column: 77 - 32
"...0" /></td> <td width="1" bgcolor="#cccccc"><!--ve..." Line: 371 Column: 77 - 32
"...0" /></td> <td width="8" bgcolor="#ffffff"><!-- s..." Line: 430 Column: 78 - 133
"...0" /></td> <td width="160" bgcolor="#efefef" valign="top" align="center" class="secondary" style="border-right: 1px #FFF solid; padding: 10px;"> <!-- ..." Line: 449 Column: 5 - 22
"...="0"> <tr> <td bgcolor="#cccccc"><img s..."

An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.

Line: 108 Column: 155 - 309
"...="_blank"><img src="http://adserver.adtechus.com/adserv/3.0/5159/425849/0/225/ADTECH;loc=300;key=key1+key2+key3+key4;grp=[group]" border="0" width="728" height="90"></a></..." Line: 183 Column: 154 - 304
"...="_blank"><img src="http://adserver.adtechus.com/adserv/3.0/5159/425846/0/16/ADTECH;loc=300;key=key1+key2+key3+key4;grp=[group]" border="0" width="1" height="1"></a></..." Line: 438 Column: 155 - 310
"...="_blank"><img src="http://adserver.adtechus.com/adserv/3.0/5159/425844/0/154/ADTECH;loc=300;key=key1+key2+key3+key4;grp=[group]" border="0" width="160" height="600"></a></..."

Table column 2 established by element “td” has no cells beginning in it.

Line: 77 Column: 5 - 29
"...="0"> <tr> <td colspan="2" valign="top"> <!-- ..."

The “width” attribute on the “td” element is obsolete. Use CSS instead.

Line: 118 Column: 5 - 96
"...="0"> <tr> <td width="160" rowspan="3" valign="top" bgcolor="#000000" style="border-left: 1px #FFF solid;"> <noin..." Line: 126 Column: 5 - 46
"...</tr> <tr> <td valign="top" bgcolor="#000000" width="10"><img s..." Line: 127 Column: 124 - 59
"...0" /></td> <td valign="top" bcolor="#000000" width="150" class="nav3"> <!-- ..." Line: 169 Column: 6 - 15
"...dex> </td> <td width="10"><!-- s..." Line: 172 Column: 78 - 30
"...0" /></td> <td width="100%" valign="top"> <img ..." Line: 367 Column: 6 - 32
"..." /> </td> <td width="5" bgcolor="#ffffff"><!-- s..." Line: 369 Column: 77 - 32
"...0" /></td> <td width="1" bgcolor="#cccccc"><!--ve..." Line: 371 Column: 77 - 32
"...0" /></td> <td width="8" bgcolor="#ffffff"><!-- s..." Line: 374 Column: 77 - 31
"...0" /></td> <td width="170px" valign="top"> <!-- ..." Line: 428 Column: 6 - 28
"... /> </td> <td width="10" valign="top"><!-- s..." Line: 430 Column: 78 - 133
"...0" /></td> <td width="160" bgcolor="#efefef" valign="top" align="center" class="secondary" style="border-right: 1px #FFF solid; padding: 10px;"> <!-- ..."

Element “noindex” not allowed as child of element “td” in this context. (Suppressing further errors from this subtree.)

Line: 119 Column: 1 - 9
"... solid;"> <noindex> <!-- ..."

The “bgcolor” attribute on the “table” element is obsolete. Use CSS instead.

Line: 121 Column: 1 - 80
"...avbar --> <table width="160" border="0" cellpadding="0" cellspacing="0" bgcolor="#000000"> <tr> ..."

The “align” attribute on the “div” element is obsolete. Use CSS instead.

Line: 176 Column: 1 - 47
"...1894 --> <div align="center" style="visibility: hidden"> <!-- ..."

Bad value “http://adserver.adtechus.com/adlink/3.0/5159/425846/0/16/ADTECH;loc=300;key=key1+key2+key3+key4;grp=[group]” for attribute “href” on element “a”: Illegal character in path segment: “[” is not allowed.

Line: 183 Column: 20 - 153
"...<noscript><a href="http://adserver.adtechus.com/adlink/3.0/5159/425846/0/16/ADTECH;loc=300;key=key1+key2+key3+key4;grp=[group]" target="_blank"><img s..."

Bad value “http://adserver.adtechus.com/adserv/3.0/5159/425846/0/16/ADTECH;loc=300;key=key1+key2+key3+key4;grp=[group]” for attribute “src” on element “img”: Illegal character in path segment: “[” is not allowed.

Line: 183 Column: 154 - 304
"...="_blank"><img src="http://adserver.adtechus.com/adserv/3.0/5159/425846/0/16/ADTECH;loc=300;key=key1+key2+key3+key4;grp=[group]" border="0" width="1" height="1"></a></..."

The “valign” attribute on the “tr” element is obsolete. Use CSS instead.

Line: 198 Column: 22 - 17
"...h="100%" > <tr valign="top"> ..." Line: 206 Column: 28 - 17
"...h="100%" > <tr valign="top"> ..." Line: 214 Column: 28 - 17
"...h="100%" > <tr valign="top"> ..." Line: 222 Column: 28 - 17
"...h="100%" > <tr valign="top"> ..." Line: 230 Column: 28 - 17
"...h="100%" > <tr valign="top"> ..." Line: 238 Column: 28 - 17
"...h="100%" > <tr valign="top"> ..." Line: 246 Column: 28 - 17
"...h="100%" > <tr valign="top"> ..." Line: 254 Column: 28 - 17
"...h="100%" > <tr valign="top"> ..." Line: 262 Column: 28 - 17
"...h="100%" > <tr valign="top"> ..." Line: 270 Column: 28 - 17
"...h="100%" > <tr valign="top"> ..." Line: 278 Column: 28 - 17
"...h="100%" > <tr valign="top"> ..." Line: 286 Column: 28 - 17
"...h="100%" > <tr valign="top"> ..." Line: 294 Column: 28 - 17
"...h="100%" > <tr valign="top"> ..." Line: 302 Column: 28 - 17
"...h="100%" > <tr valign="top"> ..." Line: 310 Column: 28 - 17
"...h="100%" > <tr valign="top"> ..." Line: 318 Column: 28 - 17
"...h="100%" > <tr valign="top"> ..." Line: 326 Column: 28 - 17
"...h="100%" > <tr valign="top"> ..." Line: 334 Column: 28 - 17
"...h="100%" > <tr valign="top"> ..." Line: 342 Column: 28 - 17
"...h="100%" > <tr valign="top"> ..." Line: 350 Column: 28 - 17
"...h="100%" > <tr valign="top"> ..."

Element “srong” not allowed as child of element “a” in this context. (Suppressing further errors from this subtree.)

Line: 384 Column: 114 - 120
"...nois.php"><srong>Univer..."

Stray end tag “strong”.

Line: 384 Column: 174 - 182
"... Education</strong></a> u..."

End tag “a” violates nesting rules.

Line: 384 Column: 183 - 186
"...n</strong></a> upon ..."

Attribute “mybuyszone” not allowed on element “div” at this point.

Line: 407 Column: 1 - 20
"... Zone --> <div mybuyszone="5"></div>..."

Bad value “http://adserver.adtechus.com/adlink/3.0/5159/425844/0/154/ADTECH;loc=300;key=key1+key2+key3+key4;grp=[group]” for attribute “href” on element “a”: Illegal character in path segment: “[” is not allowed.

Line: 438 Column: 20 - 154
"...<noscript><a href="http://adserver.adtechus.com/adlink/3.0/5159/425844/0/154/ADTECH;loc=300;key=key1+key2+key3+key4;grp=[group]" target="_blank"><img s..."

Bad value “http://adserver.adtechus.com/adserv/3.0/5159/425844/0/154/ADTECH;loc=300;key=key1+key2+key3+key4;grp=[group]” for attribute “src” on element “img”: Illegal character in path segment: “[” is not allowed.

Line: 438 Column: 155 - 310
"...="_blank"><img src="http://adserver.adtechus.com/adserv/3.0/5159/425844/0/154/ADTECH;loc=300;key=key1+key2+key3+key4;grp=[group]" border="0" width="160" height="600"></a></..."

Table cell spans past the end of its row group established by a “tbody” element; clipped to the end of the row group.

Line: 118 Column: 5 - 96
"...="0"> <tr> <td width="160" rowspan="3" valign="top" bgcolor="#000000" style="border-left: 1px #FFF solid;"> <noin..."

Element “h3” not allowed as child of element “span” in this context. (Suppressing further errors from this subtree.)

Line: 471 Column: 8 - 11
"..."> <h3>About ..." Line: 486 Column: 8 - 11
"..."> <h3>Commun..." Line: 501 Column: 8 - 11
"..."> <h3>Partne..." Line: 514 Column: 8 - 11
"..."> <h3>Shop O..."

Element “ul” not allowed as child of element “span” in this context. (Suppressing further errors from this subtree.)

Line: 472 Column: 8 - 11
"...3> <ul> ..." Line: 487 Column: 8 - 11
"...3> <ul> ..." Line: 502 Column: 8 - 11
"...3> <ul> ..." Line: 515 Column: 8 - 11
"...3> <ul> ..."

Warnings

The “language” attribute on the “script” element is obsolete. You can safely omit it.

Line: 25 Column: 1 - 70
"...cript --> <script language="JavaScript" type="text/javascript" src="/common.js"></scri..." Line: 31 Column: 1 - 53
"....css" /> <script language="JavaScript" type="text/javascript"> <script language="JavaScript" type="text/javascript" src="http://cdn.oreillystatic.com/assets/js/s_code.js"></scri..." Line: 36 Column: 1 - 53
"...</script> <script language="JavaScript" type="text/javascript"> <script language="javascript"> <script language="javascript"> <script language="javascript"><!-- d..."

The “border” attribute is obsolete. Consider specifying “img { border: 0; }” in CSS instead.

Line: 70 Column: 34 - 151
"...amp.com/"><img src="/images/onlamp/onlamp-logo.gif" width="240" height="88" hspace="0" vspace="0" border="0" alt="ONLamp.com" /></a> <..." Line: 79 Column: 107 - 219
"...lly.com/"><img src="/images/tabs/ora_gray.gif" alt="oreilly.com" width="82" height="16" hspace="0" vspace="0" border="0" /></a><a..." Line: 79 Column: 349 - 488
"...t=nav"><img src="/images/oreilly/safaribooksonline_gray.gif" alt="Safari Books Online." width="114" height="16" hspace="0" vspace="0" border="0" /></a><a hr..." Line: 79 Column: 539 - 653
"...nces/"><img src="/images/tabs/conf_gray.gif" alt="Conferences." width="88" height="16" hspace="0" vspace="0" border="0" /></a></div..." Line: 108 Column: 155 - 309
"...="_blank"><img src="http://adserver.adtechus.com/adserv/3.0/5159/425849/0/225/ADTECH;loc=300;key=key1+key2+key3+key4;grp=[group]" border="0" width="728" height="90"></a></..." Line: 111 Column: 1 - 98
"...--><br /> <img src="/images/ads/advertisement.gif" width="120" height="10" border="0" alt="advertisement" /> </td>..." Line: 123 Column: 35 - 107
"..."#000000"><img src="/images/trans.gif" alt=" " width="160" height="6" border="0" /></td> ..." Line: 126 Column: 47 - 118
"...idth="10"><img src="/images/trans.gif" alt="" width="10" height="10" border="0" /></td> ..." Line: 170 Column: 1 - 72
"... area --> <img src="/images/trans.gif" alt=" " width="10" height="1" border="0" /></td> ..." Line: 173 Column: 1 - 70
"...gn="top"> <img src="/images/trans.gif" height="6" width="1" border="0" alt="" /><br />..." Line: 183 Column: 154 - 304
"...="_blank"><img src="http://adserver.adtechus.com/adserv/3.0/5159/425846/0/16/ADTECH;loc=300;key=key1+key2+key3+key4;grp=[group]" border="0" width="1" height="1"></a></..." Line: 368 Column: 1 - 71
"... logs --> <img src="/images/trans.gif" alt=" " width="5" height="1" border="0" /></td> ..." Line: 370 Column: 1 - 71
"...blogs --> <img src="/images/trans.gif" alt=" " width="1" height="1" border="0" /></td> ..." Line: 372 Column: 1 - 71
"... news --> <img src="/images/trans.gif" alt=" " width="8" height="1" border="0" /></td> ..." Line: 429 Column: 1 - 72
"...nsors --> <img src="/images/trans.gif" alt=" " width="10" height="1" border="0" /></td> ..." Line: 438 Column: 155 - 310
"...="_blank"><img src="http://adserver.adtechus.com/adserv/3.0/5159/425844/0/154/ADTECH;loc=300;key=key1+key2+key3+key4;grp=[group]" border="0" width="160" height="600"></a></..." Line: 449 Column: 23 - 91
"..."#cccccc"><img src="/images/trans.gif" alt=" " border="0" height="1" width="1"></td> ..."

A table row was 1 columns wide, which is less than the column count established by the first row (2).

Line: 100 Column: 6 - 5
"...div> </td> </tr> <!-- ..."

This document appears to be written in English. Consider adding “lang="en"” (or variant) to the “html” start tag.

Line: 4 Column: 43 - 6
"...oose.dtd"> <html> <head..."

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onlamp.com 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.

onlamp.com 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.

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Properly formatting and compressing images can save many bytes of data.

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priority - 10Eliminate render-blocking JavaScript and CSS in above-the-fold content

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Remove render-blocking JavaScript:

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priority - 5Leverage browser caching

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Leverage browser caching for the following cacheable resources:

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Minify CSS for the following resources to reduce their size by 4.3KiB (21% reduction).

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priority - 40Eliminate render-blocking JavaScript and CSS in above-the-fold content

Your page has 7 blocking script resources and 6 blocking CSS resources. This causes a delay in rendering your page.

Remove render-blocking JavaScript:

Optimize CSS Delivery of the following:

priority - 22Optimize images

Properly formatting and compressing images can save many bytes of data.

Optimize the following images to reduce their size by 211.9KiB (95% reduction).

priority - 8Leverage 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:

priority - 8Enable compression

Compressing resources with gzip or deflate can reduce the number of bytes sent over the network.

Enable compression for the following resources to reduce their transfer size by 75KiB (72% reduction).

priority - 0Minify CSS

Compacting CSS code can save many bytes of data and speed up download and parse times.

Minify CSS for the following resources to reduce their size by 4.3KiB (21% reduction).

priority - 0Minify 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 1.5KiB (18% reduction).

priority - 0Minify HTML

Compacting HTML code, including any inline JavaScript and CSS contained in it, can save many bytes of data and speed up download and parse times.

Minify HTML for the following resources to reduce their size by 1.1KiB (14% reduction).

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onlamp.com HTML validation

Errors

Almost standards mode doctype. Expected “<!DOCTYPE html>”.

Element “title” not allowed as child of element “head” in this context. (Suppressing further errors from this subtree.)

Element “noindex” not allowed as child of element “body” in this context. (Suppressing further errors from this subtree.)

The “width” attribute on the “table” element is obsolete. Use CSS instead.

The “cellspacing” attribute on the “table” element is obsolete. Use CSS instead.

The “cellpadding” attribute on the “table” element is obsolete. Use CSS instead.

The “border” attribute on the “table” element is obsolete. Use CSS instead.

The “valign” attribute on the “td” element is obsolete. Use CSS instead.

The “align” attribute on the “td” element is obsolete. Use CSS instead.

The “hspace” attribute on the “img” element is obsolete. Use CSS instead.

The “vspace” attribute on the “img” element is obsolete. Use CSS instead.