libretexts.org Website Information

Daily Unique Visits: 285,796

Daily Page Views: 2,286,368

Income Per Day: $2,286

Estimated Value: $2,468,880

This website is located in United States and is using following IP address 167.99.169.234. See the complete list of popular websites hosted in United States.

libretexts.org is registered under .ORG top-level domain. Please check other sites in .ORG zone.

Website libretexts.org is using the following name servers:

celine.ns.cloudflare.com
ridge.ns.cloudflare.com

and is probably hosted by DIGITALOCEAN-ASN - DigitalOcean, LLC, US. See the full list of other websites hosted by DIGITALOCEAN-ASN - DigitalOcean, LLC, US.

The highest website libretexts.org position in Alexa rank database was 5297 and the lowest rank position was 5480. Current position of libretexts.org in Alexa rank database is 5332.

Desktop speed score of libretexts.org (77/100) is better than the results of 63.93% of other sites and shows that the page desktop performance can be improved.

Mobile usability score of libretexts.org (96/100) is better than the results of 46.59% of other sites and means that the page is mobile-friendly.

Mobile speed score of libretexts.org (66/100) is better than the results of 68.49% of other sites and shows that the landing page performance on mobile devices is poor and can be improved.

libretexts.org 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.

libretexts.org 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: libretexts.org
Registry Domain ID: c2b3ddc634124809bd69ca9ba8623db2-LROR
Registrar WHOIS Server: http://whois.google.com
Registrar URL: https://domains.google.com
Updated Date: 2022-09-05T22:17:16Z
Creation Date: 2016-07-22T22:17:14Z
Registry Expiry Date: 2023-07-22T22:17:14Z
Registrar: Google LLC
Registrar IANA ID: 895
Registrar Abuse Contact Email: registrar-abuse@google.com
Registrar Abuse Contact Phone: +1.8772376466
Domain Status: clientTransferProhibited https://icann.org/epp#clientTransferProhibited
Registry Registrant ID: REDACTED FOR PRIVACY
Registrant Name: REDACTED FOR PRIVACY
Registrant Organization: Contact Privacy Inc. Customer 7151571251
Registrant Street: REDACTED FOR PRIVACY
Registrant City: REDACTED FOR PRIVACY
Registrant State/Province: ON
Registrant Postal Code: REDACTED FOR PRIVACY
Registrant Country: CA
Registrant Phone: REDACTED FOR PRIVACY
Registrant Phone Ext: REDACTED FOR PRIVACY
Registrant Fax: REDACTED FOR PRIVACY
Registrant Fax Ext: REDACTED FOR PRIVACY
Registrant Email: Please query the RDDS service of the Registrar of Record identified in this output for information on how to contact the Registrant, Admin, or Tech contact of the queried domain name.
Registry Admin ID: REDACTED FOR PRIVACY
Admin Name: REDACTED FOR PRIVACY
Admin Organization: REDACTED FOR PRIVACY
Admin Street: REDACTED FOR PRIVACY
Admin City: REDACTED FOR PRIVACY
Admin State/Province: REDACTED FOR PRIVACY
Admin Postal Code: REDACTED FOR PRIVACY
Admin Country: REDACTED FOR PRIVACY
Admin Phone: REDACTED FOR PRIVACY
Admin Phone Ext: REDACTED FOR PRIVACY
Admin Fax: REDACTED FOR PRIVACY
Admin Fax Ext: REDACTED FOR PRIVACY
Admin Email: Please query the RDDS service of the Registrar of Record identified in this output for information on how to contact the Registrant, Admin, or Tech contact of the queried domain name.
Registry Tech ID: REDACTED FOR PRIVACY
Tech Name: REDACTED FOR PRIVACY
Tech Organization: REDACTED FOR PRIVACY
Tech Street: REDACTED FOR PRIVACY
Tech City: REDACTED FOR PRIVACY
Tech State/Province: REDACTED FOR PRIVACY
Tech Postal Code: REDACTED FOR PRIVACY
Tech Country: REDACTED FOR PRIVACY
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Tech Phone Ext: REDACTED FOR PRIVACY
Tech Fax: REDACTED FOR PRIVACY
Tech Fax Ext: REDACTED FOR PRIVACY
Tech Email: Please query the RDDS service of the Registrar of Record identified in this output for information on how to contact the Registrant, Admin, or Tech contact of the queried domain name.
Name Server: ns1.digitalocean.com
Name Server: ns2.digitalocean.com
Name Server: ns3.digitalocean.com
DNSSEC: unsigned
URL of the ICANN Whois Inaccuracy Complaint Form: https://www.icann.org/wicf/
>>> Last update of WHOIS database: 2022-10-11T06:13:20Z

libretexts.org server information

Servers Location

libretexts.org desktop page speed rank

Last tested: 2018-03-08

Desktop Speed Medium

77/100

libretexts.org Desktop Speed Test Quick Summary

priority - 13Leverage 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://libretexts.org/css/animate.css (expiration not specified)
http://libretexts.org/css/bootstrap.css (expiration not specified)
http://libretexts.org/css/icomoon.css (expiration not specified)
http://libretexts.org/css/lightbox.css (expiration not specified)
http://libretexts.org/css/style.css (expiration not specified)
http://libretexts.org/images/close.png (expiration not specified)
http://libretexts.org/images/header_transition_gradient.png (expiration not specified)
http://libretexts.org/images/loader.gif (expiration not specified)
http://libretexts.org/images/loading.gif (expiration not specified)
http://libretexts.org/images/next.png (expiration not specified)
http://libretexts.org/images/prev.png (expiration not specified)
http://libretexts.org/images/sp.gif (expiration not specified)
http://libretexts.org/img/avatar_liz.png (expiration not specified)
http://libretexts.org/img/bg_laptop.jpg (expiration not specified)
http://libretexts.org/img/header_bg.png (expiration not specified)
http://libretexts.org/img/header_logo.png (expiration not specified)
http://libretexts.org/img/nav_bg.png (expiration not specified)
http://libretexts.org/js/bootstrap.min.js (expiration not specified)
http://libretexts.org/js/jquery.easing.1.3.js (expiration not specified)
http://libretexts.org/js/jquery.min.js (expiration not specified)
http://libretexts.org/js/jquery.waypoints.min.js (expiration not specified)
http://libretexts.org/js/lightbox.js (expiration not specified)
http://libretexts.org/js/main.js (expiration not specified)
http://libretexts.org/js/modernizr-2.6.2.min.js (expiration not specified)
https://www.googletagmanager.com/gtag/js?id=UA-109132099-1 (15 minutes)
https://www.google-analytics.com/analytics.js (2 hours)

priority - 8Optimize images

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

Optimize the following images to reduce their size by 77.3KiB (44% reduction).

Compressing http://libretexts.org/img/bg_laptop.jpg could save 70.4KiB (46% reduction).
Compressing http://libretexts.org/img/header_logo.png could save 6.9KiB (31% reduction).

priority - 6Eliminate render-blocking JavaScript and CSS in above-the-fold content

Your page has 1 blocking script resources and 5 blocking CSS resources. This causes a delay in rendering your page.

Remove render-blocking JavaScript:

http://libretexts.org/js/modernizr-2.6.2.min.js

Optimize CSS Delivery of the following:

http://libretexts.org/css/animate.css
http://libretexts.org/css/icomoon.css
http://libretexts.org/css/bootstrap.css
http://libretexts.org/css/style.css
http://libretexts.org/css/lightbox.css

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 3.4KiB (42% reduction).

Minifying http://libretexts.org/js/lightbox.js could save 2KiB (42% reduction) after compression.
Minifying http://libretexts.org/js/jquery.easing.1.3.js could save 1.2KiB (58% reduction) after compression.
Minifying http://libretexts.org/js/main.js could save 244B (19% reduction) after compression.

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 1.9KiB (13% reduction).

Minifying http://libretexts.org/css/style.css could save 907B (15% reduction) after compression.
Minifying http://libretexts.org/css/animate.css could save 900B (11% reduction) after compression.
Minifying http://libretexts.org/css/lightbox.css could save 121B (12% 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 1.6KiB (38% reduction).

Minifying http://libretexts.org/ could save 1.6KiB (38% reduction) after compression.

libretexts.org Desktop Resource Breakdown

Total Resources	29
Number of Hosts	3
Static Resources	26
JavaScript Resources	9
CSS Resources	5

libretexts.org mobile page speed rank

Last tested: 2018-03-08

Mobile Speed Medium

66/100

libretexts.org Mobile Speed Test Quick Summary

priority - 24Eliminate render-blocking JavaScript and CSS in above-the-fold content

Your page has 1 blocking script resources and 5 blocking CSS resources. This causes a delay in rendering your page.

Remove render-blocking JavaScript:

http://libretexts.org/js/modernizr-2.6.2.min.js

Optimize CSS Delivery of the following:

http://libretexts.org/css/animate.css
http://libretexts.org/css/icomoon.css
http://libretexts.org/css/bootstrap.css
http://libretexts.org/css/style.css
http://libretexts.org/css/lightbox.css

priority - 19Leverage 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 - 8Optimize images

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

Optimize the following images to reduce their size by 77.3KiB (44% reduction).

Compressing http://libretexts.org/img/bg_laptop.jpg could save 70.4KiB (46% reduction).
Compressing http://libretexts.org/img/header_logo.png could save 6.9KiB (31% 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 3.4KiB (42% 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 1.9KiB (13% 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 1.6KiB (38% reduction).

Minifying http://libretexts.org/ could save 1.6KiB (38% reduction) after compression.

libretexts.org Mobile Resource Breakdown

Total Resources	29
Number of Hosts	3
Static Resources	26
JavaScript Resources	9
CSS Resources	5

libretexts.org mobile page usability

Last tested: 2018-03-08

Mobile Usability Good

96/100

libretexts.org Mobile Usability Test Quick Summary

priority - 3Size 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 427 CSS pixels wide, but the viewport is only 412 CSS pixels wide. The following elements fall outside the viewport:

libretexts.org HTML validation

Warnings

Consider avoiding viewport values that prevent users from resizing documents.

Line: 7 Column: 2 - 108
"...</title> <meta name="viewport" content="width=device-width; initial-scale=1.0; maximum-scale=1.0; user-scalable=0;"> <met..."

The “navigation” role is unnecessary for element “nav”.

Line: 65 Column: 2 - 42
"...="page"> <nav class="fh5co-nav" role="navigation"> <di..."

A table row was 5 columns wide and exceeded the column count established by the first row (2).

Line: 214 Column: 17 - 10
"...font></td> </tr> ..."

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

Line: 215 Column: 32 - 36
"...><td></td></tr> ..."

The document is not mappable to XML 1.0 due to two consecutive hyphens in a comment.

Line: 406 Column: - 12
"...tr> <!-- <tr> ..." Line: 443 Column: - 25
"... OLD 3 STEPS -----------------..." Line: 443 Column: - 48
"...--------------- ..." Line: 616 Column: - 26
"... NEW GALLERY -----------------..." Line: 704 Column: - 30
"...ARTER BUTTON -----------------..." Line: 704 Column: - 47
"...--------------- <div class=..." Line: 725 Column: - 27
"...SOCIAL ICONS -----------------..." Line: 725 Column: - 48
"...--------------- ..."

The “contentinfo” role is unnecessary for element “footer”.

Line: 719 Column: 2 - 144
"... </div> <footer id="fh5co-footer" role="contentinfo" style="background-image: url(images/header_transition_gradient.png); background-repeat: repeat-x"> <..."

Errors

Bad value “45px” for attribute “height” on element “img”: Expected a digit but saw “p” instead.

Line: 72 Column: 5 - 43
"...g-9"> <img src="images/sp.gif" height="45px"><br> ..."

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

Line: 72 Column: 5 - 43
"...g-9"> <img src="images/sp.gif" height="45px"><br> ..." Line: 112 Column: 14 - 49
"... <td><img src="images/sp.gif" width="30"><img s..." Line: 112 Column: 50 - 80
"...idth="30"><img src="img/header_logo.png"></td> ..." Line: 638 Column: 10 - 39
"... <img src="img/avatar_liz.png"> ..."

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

Line: 105 Column: 3 - 58
"...64ba;"> <div width="100%" style="min-height:0px; padding: 0px;"> <t..."

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

Line: 106 Column: 4 - 66
"...0px;"> <table width="100%" border="0" cellspacing="0" cellpadding="0"> ..." Line: 109 Column: 33 - 94
"..."><center><table width="960" border="0" cellspacing="0" cellpadding="0"> ..."

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

Line: 109 Column: 11 - 24
"... <tr> <td height="150"><cente..."

The “center” element is obsolete. Use CSS instead.

Line: 109 Column: 25 - 32
"...ght="150"><center><table..." Line: 184 Column: 5 - 12
"...-x"> <center><table..." Line: 198 Column: 5 - 12
"...d;"> <center><table..." Line: 271 Column: 5 - 12
"...d;"> <center><table..." Line: 285 Column: 28 - 35
"...r="white"><center>The Li..." Line: 292 Column: 28 - 35
"...r="white"><center>The li..." Line: 299 Column: 28 - 35
"...r="white"><center>Always..." Line: 306 Column: 28 - 35
"...r="white"><center>Libret..." Line: 311 Column: 38 - 45
"...lspan="4"><center><span ..."

Attribute “height” not allowed on element “tr” at this point.

Line: 185 Column: 45 - 21
"...h: 960px"> <tr height="48"><td>&n..." Line: 199 Column: 56 - 22
"...d="about"> <tr height="120"><td>&n..." Line: 215 Column: 11 - 22
"... </tr> <tr height="120"><td></..." Line: 272 Column: 61 - 21
"...: 960px;"> <tr height="80"> ..." Line: 311 Column: 11 - 21
"... </tr> <tr height="80"><td co..." Line: 313 Column: 176 - 21
"...</td></tr> <tr height="80"><td co..."

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

Line: 202 Column: 11 - 22
"... </tr> <tr valign="top"> ..." Line: 276 Column: 11 - 22
"... </tr> <tr valign="top"> ..." Line: 282 Column: 11 - 22
"... </tr> <tr valign="top"> ..."

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

Line: 203 Column: 23 - 21
"...ign="top"> <td width="300"> ..." Line: 207 Column: 11 - 20
"... </td> <td width="50"> ..." Line: 208 Column: 32 - 35
"...nbsp;</td> <td width="2" bgcolor="white"> ..." Line: 209 Column: 47 - 20
"...nbsp;</td> <td width="50"> ..." Line: 277 Column: 23 - 34
"...ign="top"> <td width="100%" colspan="4"> ..." Line: 283 Column: 23 - 45
"...ign="top"> <td width="25%" style="padding: 20px;"> ..." Line: 290 Column: 12 - 45
"... </td> <td width="25%" style="padding: 20px;"> ..." Line: 297 Column: 12 - 45
"... </td> <td width="25%" style="padding: 20px;"> ..." Line: 304 Column: 12 - 45
"... </td> <td width="25%" style="padding: 20px;"> ..."

The “align” attribute on the “h1” element is obsolete. Use CSS instead.

Line: 204 Column: 7 - 46
"...0"> <h1 style="color:#0064ba" align="right"><stron..." Line: 278 Column: 7 - 45
"...4"> <h1 style="color:white" align="center"><stron..."

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

Line: 208 Column: 32 - 35
"...nbsp;</td> <td width="2" bgcolor="white"> ..."

The “font” element is obsolete. Use CSS instead.

Line: 210 Column: 45 - 66
"...2><strong><font color="#0064ba">Collab..." Line: 210 Column: 119 - 134
"...rong></h2><font size="+1"><p> Th..." Line: 284 Column: 27 - 46
"...="center"><font color="white">FREE</..." Line: 285 Column: 8 - 27
"...3> <font color="white"><cente..." Line: 291 Column: 28 - 47
"..."center" ><font color="white">MASSIV..." Line: 292 Column: 8 - 27
"...3> <font color="white"><cente..." Line: 298 Column: 27 - 46
"...="center"><font color="white">CURREN..." Line: 299 Column: 8 - 27
"...3> <font color="white"><cente..." Line: 305 Column: 27 - 46
"...="center"><font color="white">CO-OP<..." Line: 306 Column: 8 - 27
"...3> <font color="white"><cente..." Line: 629 Column: 11 - 30
"... <h2><font color="white">What a..." Line: 641 Column: 36 - 55
"...dark"><h4><font color="white">"♥♥ It..." Line: 642 Column: 35 - 54
"...or"><cite><font color="white">— Eliz..." Line: 723 Column: 31 - 63
"...s="block"><font color="white" size="small">Copyri..."

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

Line: 210 Column: 135 - 137
"...size="+1"><p> The L..." Line: 212 Column: 8 - 10
"...p> <p><b>In ..."

The “align” attribute on the “h3” element is obsolete. Use CSS instead.

Line: 284 Column: 8 - 26
"..."> <h3 align="center"><font ..." Line: 291 Column: 8 - 27
"..."> <h3 align="center" ><font ..." Line: 298 Column: 8 - 26
"..."> <h3 align="center"><font ..." Line: 305 Column: 8 - 26
"..."> <h3 align="center"><font ..."

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

Line: 285 Column: 28 - 35
"...r="white"><center>The Li..." Line: 292 Column: 28 - 35
"...r="white"><center>The li..." Line: 299 Column: 28 - 35
"...r="white"><center>Always..." Line: 306 Column: 28 - 35
"...r="white"><center>Libret..."

Saw “<!--” within a comment. Probable cause: Nested comment (not allowed).

Line: 406 Column: - 12
"...tr> <!-- <tr> ..."

Stray end tag “div”.

Line: 717 Column: 2 - 7
"... </div> </div> <fo..." Line: 760 Column: 2 - 7
"...t> </div> </div..." Line: 761 Column: 1 - 6
"... </div> </div> </bo..."

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libretexts.org 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.

libretexts.org 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.

LIBRETEXTS.ORG Website Information

libretexts.org Website Information

Advertisement

libretexts.org Alexa Rank

libretexts.org whois

libretexts.org server information

Servers Location

libretexts.org desktop page speed rank

libretexts.org Desktop Speed Test Quick Summary

priority - 13Leverage 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 - 8Optimize images

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

Optimize the following images to reduce their size by 77.3KiB (44% reduction).

priority - 6Eliminate render-blocking JavaScript and CSS in above-the-fold content

Your page has 1 blocking script resources and 5 blocking CSS resources. This causes a delay in rendering your page.

Remove render-blocking JavaScript:

Optimize CSS Delivery of the following:

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 3.4KiB (42% 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 1.9KiB (13% 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 1.6KiB (38% reduction).

libretexts.org Desktop Resource Breakdown

libretexts.org mobile page speed rank

libretexts.org Mobile Speed Test Quick Summary

priority - 24Eliminate render-blocking JavaScript and CSS in above-the-fold content

Your page has 1 blocking script resources and 5 blocking CSS resources. This causes a delay in rendering your page.

Remove render-blocking JavaScript:

Optimize CSS Delivery of the following:

priority - 19Leverage 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 - 8Optimize images

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

Optimize the following images to reduce their size by 77.3KiB (44% 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 3.4KiB (42% 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 1.9KiB (13% 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 1.6KiB (38% reduction).

libretexts.org Mobile Resource Breakdown

libretexts.org mobile page usability

libretexts.org Mobile Usability Test Quick Summary

priority - 3Size 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 427 CSS pixels wide, but the viewport is only 412 CSS pixels wide. The following elements fall outside the viewport:

libretexts.org HTML validation

Warnings

Consider avoiding viewport values that prevent users from resizing documents.

The “navigation” role is unnecessary for element “nav”.

A table row was 5 columns wide and exceeded the column count established by the first row (2).

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

The document is not mappable to XML 1.0 due to two consecutive hyphens in a comment.

The “contentinfo” role is unnecessary for element “footer”.

Errors

Bad value “45px” for attribute “height” on element “img”: Expected a digit but saw “p” instead.

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

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

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

The “center” element is obsolete. Use CSS instead.

Attribute “height” not allowed on element “tr” at this point.

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

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

The “align” attribute on the “h1” element is obsolete. Use CSS instead.

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

The “font” element is obsolete. Use CSS instead.