storyofmathematics.com Website Information

Daily Unique Visits: 22,118

Daily Page Views: 132,708

Income Per Day: $265

Estimated Value: $190,800

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

No name server records were found.

and is probably hosted by PRIVATESYSTEMS - PrivateSystems Networks, US. See the full list of other websites hosted by PRIVATESYSTEMS - PrivateSystems Networks, US.

The highest website storyofmathematics.com position in Alexa rank database was 58441 and the lowest rank position was 176954. Current position of storyofmathematics.com in Alexa rank database is 64845.

Desktop speed score of storyofmathematics.com (78/100) is better than the results of 65.98% of other sites and shows that the page desktop performance can be improved.

Mobile usability score of storyofmathematics.com (60/100) is better than the results of 3.95% of other sites and means that the page is not mobile-friendly.

Mobile speed score of storyofmathematics.com (70/100) is better than the results of 76.43% of other sites and shows that the landing page performance on mobile devices is poor and can be improved.

storyofmathematics.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.

storyofmathematics.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: STORYOFMATHEMATICS.COM
Registry Domain ID: 1583290554_DOMAIN_COM-VRSN
Registrar WHOIS Server: whois.namecheap.com
Registrar URL: http://www.namecheap.com
Updated Date: 2024-06-18T14:00:21Z
Creation Date: 2010-01-27T14:21:34Z
Registry Expiry Date: 2028-01-27T14:21:34Z
Registrar: NameCheap, Inc.
Registrar IANA ID: 1068
Registrar Abuse Contact Email: abuse@namecheap.com
Registrar Abuse Contact Phone: +1.6613102107
Domain Status: clientTransferProhibited https://icann.org/epp#clientTransferProhibited
Name Server: NS1.KNHTAT.COM
Name Server: NS2.KNHTAT.COM
DNSSEC: unsigned
URL of the ICANN Whois Inaccuracy Complaint Form: https://www.icann.org/wicf/
>>> Last update of whois database: 2024-11-11T00:06:43Z

storyofmathematics.com server information

Servers Location

storyofmathematics.com desktop page speed rank

Last tested: 2019-06-17

Desktop Speed Medium

78/100

storyofmathematics.com Desktop Speed Test Quick Summary

priority - 17Leverage 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://storyofmathematics.com/images/arrow.gif (expiration not specified)
http://storyofmathematics.com/images/bg.jpg (expiration not specified)
http://storyofmathematics.com/images/logo.gif (expiration not specified)
http://storyofmathematics.com/images/menu_contact.gif (expiration not specified)
http://storyofmathematics.com/images/menu_contact_on.gif (expiration not specified)
http://storyofmathematics.com/images/menu_glossary.gif (expiration not specified)
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http://storyofmathematics.com/images/menu_story.gif (expiration not specified)
http://storyofmathematics.com/images/menu_story_on.gif (expiration not specified)
http://storyofmathematics.com/images/search.gif (expiration not specified)
http://storyofmathematics.com/images/top_pic0.jpg (expiration not specified)
http://storyofmathematics.com/images/top_pic1.jpg (expiration not specified)
http://storyofmathematics.com/images/top_pic2.jpg (expiration not specified)
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http://storyofmathematics.com/images/transparent_blank.gif (expiration not specified)
http://storyofmathematics.com/images/treeview-default-line.gif (expiration not specified)
http://storyofmathematics.com/images/treeview-default.gif (expiration not specified)
http://storyofmathematics.com/jquery.js (expiration not specified)
http://storyofmathematics.com/menu.js (expiration not specified)
http://storyofmathematics.com/random_image.js (expiration not specified)
http://storyofmathematics.com/stylesheet.css (expiration not specified)

priority - 6Optimize images

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priority - 4Eliminate render-blocking JavaScript and CSS in above-the-fold content

Your page has 3 blocking script resources and 1 blocking CSS resources. This causes a delay in rendering your page.

Remove render-blocking JavaScript:

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http://storyofmathematics.com/menu.js
http://storyofmathematics.com/jquery.js

Optimize CSS Delivery of the following:

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priority - 0Minify JavaScript

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Minify JavaScript for the following resources to reduce their size by 246B (48% reduction).

Minifying http://storyofmathematics.com/random_image.js could save 246B (48% reduction) after compression.

storyofmathematics.com Desktop Resource Breakdown

Total Resources	34
Number of Hosts	1
Static Resources	33
JavaScript Resources	3
CSS Resources	1

storyofmathematics.com mobile page speed rank

Last tested: 2019-01-23

Mobile Speed Medium

70/100

storyofmathematics.com Mobile Speed Test Quick Summary

priority - 25Leverage 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 - 16Eliminate render-blocking JavaScript and CSS in above-the-fold content

Your page has 3 blocking script resources and 1 blocking CSS resources. This causes a delay in rendering your page.

Remove render-blocking JavaScript:

http://storyofmathematics.com/random_image.js
http://storyofmathematics.com/menu.js
http://storyofmathematics.com/jquery.js

Optimize CSS Delivery of the following:

http://storyofmathematics.com/stylesheet.css

priority - 3Optimize images

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Optimize the following images to reduce their size by 24.9KiB (10% reduction).

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priority - 0Minify JavaScript

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Minify JavaScript for the following resources to reduce their size by 1.2KiB (7% reduction).

Minifying http://storyofmathematics.com/jquery.js could save 1.2KiB (7% reduction) after compression.

storyofmathematics.com Mobile Resource Breakdown

Total Resources	34
Number of Hosts	1
Static Resources	33
JavaScript Resources	3
CSS Resources	1

storyofmathematics.com mobile page usability

Last tested: 2019-01-23

Mobile Usability Bad

60/100

storyofmathematics.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.

The Story of Mathematics renders only 6 pixels tall (16 CSS pixels).

Sumerian/Babyl…an Mathematics and 15 others render only 4 pixels tall (13 CSS pixels).

List of Import…Mathematicians and 3 others render only 4 pixels tall (13 CSS pixels).

WELCOME TO THE…OF MATHEMATICS renders only 6 pixels tall (18 CSS pixels).

WHAT IS MATHEMATICS? renders only 4 pixels tall (13 CSS pixels).

The discipline…and many more. and 8 others render only 4 pixels tall (13 CSS pixels).

Microsoft Encarta Encyclopedia and 1 others render only 4 pixels tall (13 CSS pixels).

The history of…we know today. and 23 others render only 4 pixels tall (13 CSS pixels).

List of Import…Mathematicians and 17 others render only 4 pixels tall (13 CSS pixels).

THE STORY OF MATHEMATICS renders only 4 pixels tall (13 CSS pixels).

List of Import…Mathematicians and 5 others render only 3 pixels tall (10 CSS pixels).

Home | and 4 others render only 3 pixels tall (10 CSS pixels).

priority - 19Size 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="tips" type="text" name="terms"> is close to 2 other tap targets.

The tap target <input type="image"> is close to 2 other tap targets.

The tap target <a href="sources.html"></a> and 1 others are close to other tap targets.

The tap target <a href="story.html" class="menu">The Story of Mathematics</a> is close to 1 other tap targets.

The tap target <a href="prehistoric.html" class="menu">Prehistoric Mathematics</a> and 15 others are close to other tap targets.

The tap target <div class="hitarea expandable-hitarea"> and 8 others are close to other tap targets.

The tap target <div class="hitarea expand…ndable-hitarea"> is close to 7 other tap targets.

The tap target <a href="mathematicians.html" class="menu">List of Import…Mathematicians</a> and 3 others are close to other tap targets.

The tap target <a href="prehistoric.html">early man</a> and 13 others are close to other tap targets.

The tap target <a href="#Top">Back to Top of Page</a> and 3 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.

storyofmathematics.com HTML validation

Errors

Start tag seen without seeing a doctype first. Expected “<!DOCTYPE html>”.

Line: 1 Column: 1 - 6
"...<HTML> <HE..."

Malformed byte sequence: “e9”.

Line: 5 Column: - 1496
"......" Line: 189 Column: - 57
"......"

Malformed byte sequence: “f6”.

Line: 5 Column: - 1566
"......" Line: 197 Column: - 48
"......"

Attribute “leftmargin” not allowed on element “body” at this point.

Line: 15 Column: 1 - 167
"...EAD> <BODY bgcolor="#FEE1A7" BACKGROUND="images/bg.jpg" text="#000000" link="#946300" alink="#503402" vlink="#946300" leftmargin=0 topmargin=0 marginheight=0 marginwidth=0> ..."

Attribute “topmargin” not allowed on element “body” at this point.

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

The “background” attribute on the “body” element is obsolete. Use CSS instead.

The “text” attribute on the “body” element is obsolete. Use CSS instead.

The “link” attribute on the “body” element is obsolete. Use CSS instead.

The “alink” attribute on the “body” element is obsolete. Use CSS instead.

The “vlink” attribute on the “body” element is obsolete. Use CSS instead.

The “marginheight” attribute on the “body” element is obsolete. Use CSS instead.

The “marginwidth” attribute on the “body” element is obsolete. Use CSS instead.

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

Line: 19 Column: 1 - 91
"...op"></A> <table border="0" width="902" CELLSPACING=0 CELLPADDING=0 BGCOLOR="#000000" ALIGN="CENTER"> <form..." Line: 26 Column: 1 - 73
"..."center"> <table border="0" width="900" CELLSPACING=0 CELLPADDING=0 ALIGN="CENTER"><tr> <..." Line: 60 Column: 1 - 91
"...</table> <table border="0" width="902" CELLSPACING=0 CELLPADDING=0 BGCOLOR="#313131" ALIGN="CENTER"> <tr> ..." Line: 74 Column: 1 - 89
"...</table> <table border=0 width="902" CELLSPACING=0 CELLPADDING=0 BGCOLOR="#CCCCCC" ALIGN="CENTER"><tr> <..." Line: 86 Column: 1 - 89
"...table> <table border=0 width="902" CELLSPACING=0 CELLPADDING=0 BGCOLOR="#FFFFFF" ALIGN="CENTER"><tr> <..." Line: 108 Column: 1 - 89
"...table> <table border=0 width="902" CELLSPACING=0 CELLPADDING=0 BGCOLOR="#FFFFFF" ALIGN="CENTER"><tr> ..." Line: 234 Column: 1 - 86
"...Table --> <TABLE BORDER=0 WIDTH=320 CELLSPACING=0 CELLPADDING=2 ALIGN="RIGHT" BGCOLOR="#946300"><TR> <..." Line: 236 Column: 1 - 71
"..."MIDDLE"> <TABLE BORDER=0 WIDTH="316" CELLSPACING=0 CELLPADDING=5 ALIGN="CENTER"> <TR> ..." Line: 269 Column: 1 - 89
"...Table --> <TABLE BORDER=0 WIDTH="90%" CELLSPACING=0 CELLPADDING=5 BGCOLOR="#FFF3D9" ALIGN="CENTER"><TR> <..." Line: 320 Column: 1 - 89
"...table> <table border=0 width="902" CELLSPACING=0 CELLPADDING=0 BGCOLOR="#CCCCCC" ALIGN="CENTER"> <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 “bgcolor” attribute on the “table” element is obsolete. Use CSS instead.

Line: 19 Column: 1 - 91
"...op"></A> <table border="0" width="902" CELLSPACING=0 CELLPADDING=0 BGCOLOR="#000000" ALIGN="CENTER"> <form..." Line: 60 Column: 1 - 91
"...</table> <table border="0" width="902" CELLSPACING=0 CELLPADDING=0 BGCOLOR="#313131" ALIGN="CENTER"> <tr> ..." Line: 74 Column: 1 - 89
"...</table> <table border=0 width="902" CELLSPACING=0 CELLPADDING=0 BGCOLOR="#CCCCCC" ALIGN="CENTER"><tr> <..." Line: 86 Column: 1 - 89
"...table> <table border=0 width="902" CELLSPACING=0 CELLPADDING=0 BGCOLOR="#FFFFFF" ALIGN="CENTER"><tr> <..." Line: 108 Column: 1 - 89
"...table> <table border=0 width="902" CELLSPACING=0 CELLPADDING=0 BGCOLOR="#FFFFFF" ALIGN="CENTER"><tr> ..." Line: 234 Column: 1 - 86
"...Table --> <TABLE BORDER=0 WIDTH=320 CELLSPACING=0 CELLPADDING=2 ALIGN="RIGHT" BGCOLOR="#946300"><TR> <..." Line: 269 Column: 1 - 89
"...Table --> <TABLE BORDER=0 WIDTH="90%" CELLSPACING=0 CELLPADDING=5 BGCOLOR="#FFF3D9" ALIGN="CENTER"><TR> <..." Line: 320 Column: 1 - 89
"...table> <table border=0 width="902" CELLSPACING=0 CELLPADDING=0 BGCOLOR="#CCCCCC" ALIGN="CENTER"> <tr> ..."

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

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

Start tag “form” seen in “table”.

Line: 20 Column: 92 - 61
"...="CENTER"> <form action="cgi-bin/ksearch.cgi" method="get" name="form1"> <tr> ..."

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

Line: 20 Column: 92 - 61
"...="CENTER"> <form action="cgi-bin/ksearch.cgi" method="get" name="form1"> <tr> ..."

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

Line: 22 Column: 5 - 60
"...rm1"> <tr> <td valign="top" width="1" align="center" BGCOLOR="#000000"> <img ..." Line: 25 Column: 6 - 44
"...<BR> </td> <td valign="top" width="900" align="center"> <tabl..." Line: 27 Column: 78 - 44
"...NTER"><tr> <td valign="top" width="700" align="center"> <img ..." Line: 30 Column: 6 - 46
"...<BR> </td> <td valign="bottom" width="200" align="right"> <inpu..." Line: 53 Column: 6 - 60
"...e> </td> <td valign="top" width="1" align="center" BGCOLOR="#000000"> <img ..." Line: 62 Column: 5 - 60
"...TER"> <tr> <td valign="top" width="1" align="center" BGCOLOR="#000000"> <img ..." Line: 65 Column: 6 - 44
"...<BR> </td> <td valign="top" width="900" align="center"> <A HR..." Line: 68 Column: 6 - 60
"...<BR> </td> <td valign="top" width="1" align="center" BGCOLOR="#000000"> <img ..." Line: 75 Column: 94 - 60
"...NTER"><tr> <td valign="top" width="1" align="center" BGCOLOR="#000000"> <img ..." Line: 78 Column: 6 - 44
"...<BR> </td> <td valign="top" width="900" align="center"> <img ..." Line: 81 Column: 6 - 60
"...<BR> </td> <td valign="top" width="1" align="center" BGCOLOR="#000000"> <img ..." Line: 87 Column: 94 - 60
"...NTER"><tr> <td valign="top" width="1" align="center" BGCOLOR="#000000"> <img ..." Line: 90 Column: 6 - 44
"...<BR> </td> <td valign="top" width="900" align="center"> <scri..." Line: 103 Column: 6 - 60
"...ipt> </td> <td valign="top" width="1" align="center" BGCOLOR="#000000"> <img ..." Line: 110 Column: 94 - 60
"...NTER"><tr> <td valign="top" width="1" align="center" BGCOLOR="#000000"> <img ..." Line: 114 Column: 6 - 60
"...<BR> </td> <td valign="top" width="5" align="center" BGCOLOR="#FEE1A7"> <img ..." Line: 118 Column: 6 - 58
"...<BR> </td> <td valign="top" width=240 align="left" bgcolor="#FEE1A7"> <img ..." Line: 219 Column: 6 - 60
"...ONT> </td> <td valign="top" width="5" align="center" BGCOLOR="#FEE1A7"> <img ..." Line: 224 Column: 6 - 60
"...<BR> </td> <td valign="top" width="7" align="center" BGCOLOR="#FFFFFF"> <img ..." Line: 228 Column: 6 - 27
"...<BR> </td> <td valign="top" width=635> <im..." Line: 235 Column: 91 - 20
"...6300"><TR> <TD VALIGN="MIDDLE"> <TABL..." Line: 238 Column: 5 - 50
"...TER"> <TR> <TD VALIGN="TOP" ALIGN="CENTER" BGCOLOR="#946300"> <FONT..." Line: 245 Column: 5 - 35
"...</TR> <TR> <TD VALIGN="TOP" BGCOLOR="#FFF3D9"> <FONT..." Line: 270 Column: 94 - 17
"...NTER"><TR> <TD VALIGN="TOP"> <FONT..." Line: 310 Column: 6 - 60
"...--> </td> <td valign="top" width="8" align="center" BGCOLOR="#FFFFFF"> <img ..." Line: 314 Column: 6 - 60
"...<BR> </td> <td valign="top" width="1" align="center" BGCOLOR="#000000"> <img ..." Line: 322 Column: 5 - 60
"...TER"> <tr> <td valign="top" width="1" align="center" BGCOLOR="#000000"> <img ..."

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

Line: 22 Column: 5 - 60
"...rm1"> <tr> <td valign="top" width="1" align="center" BGCOLOR="#000000"> <img ..." Line: 25 Column: 6 - 44
"...<BR> </td> <td valign="top" width="900" align="center"> <tabl..." Line: 27 Column: 78 - 44
"...NTER"><tr> <td valign="top" width="700" align="center"> <img ..." Line: 30 Column: 6 - 46
"...<BR> </td> <td valign="bottom" width="200" align="right"> <inpu..." Line: 53 Column: 6 - 60
"...e> </td> <td valign="top" width="1" align="center" BGCOLOR="#000000"> <img ..." Line: 62 Column: 5 - 60
"...TER"> <tr> <td valign="top" width="1" align="center" BGCOLOR="#000000"> <img ..." Line: 65 Column: 6 - 44
"...<BR> </td> <td valign="top" width="900" align="center"> <A HR..." Line: 68 Column: 6 - 60
"...<BR> </td> <td valign="top" width="1" align="center" BGCOLOR="#000000"> <img ..." Line: 75 Column: 94 - 60
"...NTER"><tr> <td valign="top" width="1" align="center" BGCOLOR="#000000"> <img ..." Line: 78 Column: 6 - 44
"...<BR> </td> <td valign="top" width="900" align="center"> <img ..." Line: 81 Column: 6 - 60
"...<BR> </td> <td valign="top" width="1" align="center" BGCOLOR="#000000"> <img ..." Line: 87 Column: 94 - 60
"...NTER"><tr> <td valign="top" width="1" align="center" BGCOLOR="#000000"> <img ..." Line: 90 Column: 6 - 44
"...<BR> </td> <td valign="top" width="900" align="center"> <scri..." Line: 103 Column: 6 - 60
"...ipt> </td> <td valign="top" width="1" align="center" BGCOLOR="#000000"> <img ..." Line: 110 Column: 94 - 60
"...NTER"><tr> <td valign="top" width="1" align="center" BGCOLOR="#000000"> <img ..." Line: 114 Column: 6 - 60
"...<BR> </td> <td valign="top" width="5" align="center" BGCOLOR="#FEE1A7"> <img ..." Line: 118 Column: 6 - 58
"...<BR> </td> <td valign="top" width=240 align="left" bgcolor="#FEE1A7"> <img ..." Line: 219 Column: 6 - 60
"...ONT> </td> <td valign="top" width="5" align="center" BGCOLOR="#FEE1A7"> <img ..." Line: 224 Column: 6 - 60
"...<BR> </td> <td valign="top" width="7" align="center" BGCOLOR="#FFFFFF"> <img ..." Line: 228 Column: 6 - 27
"...<BR> </td> <td valign="top" width=635> <im..." Line: 310 Column: 6 - 60
"...--> </td> <td valign="top" width="8" align="center" BGCOLOR="#FFFFFF"> <img ..." Line: 314 Column: 6 - 60
"...<BR> </td> <td valign="top" width="1" align="center" BGCOLOR="#000000"> <img ..." Line: 322 Column: 5 - 60
"...TER"> <tr> <td valign="top" width="1" align="center" BGCOLOR="#000000"> <img ..."

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

Line: 22 Column: 5 - 60
"...rm1"> <tr> <td valign="top" width="1" align="center" BGCOLOR="#000000"> <img ..." Line: 25 Column: 6 - 44
"...<BR> </td> <td valign="top" width="900" align="center"> <tabl..." Line: 27 Column: 78 - 44
"...NTER"><tr> <td valign="top" width="700" align="center"> <img ..." Line: 30 Column: 6 - 46
"...<BR> </td> <td valign="bottom" width="200" align="right"> <inpu..." Line: 53 Column: 6 - 60
"...e> </td> <td valign="top" width="1" align="center" BGCOLOR="#000000"> <img ..." Line: 62 Column: 5 - 60
"...TER"> <tr> <td valign="top" width="1" align="center" BGCOLOR="#000000"> <img ..." Line: 65 Column: 6 - 44
"...<BR> </td> <td valign="top" width="900" align="center"> <A HR..." Line: 68 Column: 6 - 60
"...<BR> </td> <td valign="top" width="1" align="center" BGCOLOR="#000000"> <img ..." Line: 75 Column: 94 - 60
"...NTER"><tr> <td valign="top" width="1" align="center" BGCOLOR="#000000"> <img ..." Line: 78 Column: 6 - 44
"...<BR> </td> <td valign="top" width="900" align="center"> <img ..." Line: 81 Column: 6 - 60
"...<BR> </td> <td valign="top" width="1" align="center" BGCOLOR="#000000"> <img ..." Line: 87 Column: 94 - 60
"...NTER"><tr> <td valign="top" width="1" align="center" BGCOLOR="#000000"> <img ..." Line: 90 Column: 6 - 44
"...<BR> </td> <td valign="top" width="900" align="center"> <scri..." Line: 103 Column: 6 - 60
"...ipt> </td> <td valign="top" width="1" align="center" BGCOLOR="#000000"> <img ..." Line: 110 Column: 94 - 60
"...NTER"><tr> <td valign="top" width="1" align="center" BGCOLOR="#000000"> <img ..." Line: 114 Column: 6 - 60
"...<BR> </td> <td valign="top" width="5" align="center" BGCOLOR="#FEE1A7"> <img ..." Line: 118 Column: 6 - 58
"...<BR> </td> <td valign="top" width=240 align="left" bgcolor="#FEE1A7"> <img ..." Line: 219 Column: 6 - 60
"...ONT> </td> <td valign="top" width="5" align="center" BGCOLOR="#FEE1A7"> <img ..." Line: 224 Column: 6 - 60
"...<BR> </td> <td valign="top" width="7" align="center" BGCOLOR="#FFFFFF"> <img ..." Line: 238 Column: 5 - 50
"...TER"> <TR> <TD VALIGN="TOP" ALIGN="CENTER" BGCOLOR="#946300"> <FONT..." Line: 310 Column: 6 - 60
"...--> </td> <td valign="top" width="8" align="center" BGCOLOR="#FFFFFF"> <img ..." Line: 314 Column: 6 - 60
"...<BR> </td> <td valign="top" width="1" align="center" BGCOLOR="#000000"> <img ..." Line: 322 Column: 5 - 60
"...TER"> <tr> <td valign="top" width="1" align="center" BGCOLOR="#000000"> <img ..."

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

Line: 22 Column: 5 - 60
"...rm1"> <tr> <td valign="top" width="1" align="center" BGCOLOR="#000000"> <img ..." Line: 53 Column: 6 - 60
"...e> </td> <td valign="top" width="1" align="center" BGCOLOR="#000000"> <img ..." Line: 62 Column: 5 - 60
"...TER"> <tr> <td valign="top" width="1" align="center" BGCOLOR="#000000"> <img ..." Line: 68 Column: 6 - 60
"...<BR> </td> <td valign="top" width="1" align="center" BGCOLOR="#000000"> <img ..." Line: 75 Column: 94 - 60
"...NTER"><tr> <td valign="top" width="1" align="center" BGCOLOR="#000000"> <img ..." Line: 81 Column: 6 - 60
"...<BR> </td> <td valign="top" width="1" align="center" BGCOLOR="#000000"> <img ..." Line: 87 Column: 94 - 60
"...NTER"><tr> <td valign="top" width="1" align="center" BGCOLOR="#000000"> <img ..." Line: 103 Column: 6 - 60
"...ipt> </td> <td valign="top" width="1" align="center" BGCOLOR="#000000"> <img ..." Line: 110 Column: 94 - 60
"...NTER"><tr> <td valign="top" width="1" align="center" BGCOLOR="#000000"> <img ..." Line: 114 Column: 6 - 60
"...<BR> </td> <td valign="top" width="5" align="center" BGCOLOR="#FEE1A7"> <img ..." Line: 118 Column: 6 - 58
"...<BR> </td> <td valign="top" width=240 align="left" bgcolor="#FEE1A7"> <img ..." Line: 219 Column: 6 - 60
"...ONT> </td> <td valign="top" width="5" align="center" BGCOLOR="#FEE1A7"> <img ..." Line: 224 Column: 6 - 60
"...<BR> </td> <td valign="top" width="7" align="center" BGCOLOR="#FFFFFF"> <img ..." Line: 238 Column: 5 - 50
"...TER"> <TR> <TD VALIGN="TOP" ALIGN="CENTER" BGCOLOR="#946300"> <FONT..." Line: 245 Column: 5 - 35
"...</TR> <TR> <TD VALIGN="TOP" BGCOLOR="#FFF3D9"> <FONT..." Line: 310 Column: 6 - 60
"...--> </td> <td valign="top" width="8" align="center" BGCOLOR="#FFFFFF"> <img ..." Line: 314 Column: 6 - 60
"...<BR> </td> <td valign="top" width="1" align="center" BGCOLOR="#000000"> <img ..." Line: 322 Column: 5 - 60
"...TER"> <tr> <td valign="top" width="1" align="center" BGCOLOR="#000000"> <img ..."

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

Line: 23 Column: 1 - 66
"...#000000"> <img src="images/transparent_blank.gif" BORDER=0 WIDTH=1 HEIGHT=1><BR> <..." Line: 49 Column: 1 - 68
"...ue="1" /> <img src="images/transparent_blank.gif" BORDER=0 WIDTH=200 HEIGHT=5><BR> <..." Line: 54 Column: 1 - 66
"...#000000"> <img src="images/transparent_blank.gif" BORDER=0 WIDTH=1 HEIGHT=1><BR> <..." Line: 63 Column: 1 - 66
"...#000000"> <img src="images/transparent_blank.gif" BORDER=0 WIDTH=1 HEIGHT=1><BR> <..." Line: 69 Column: 1 - 66
"...#000000"> <img src="images/transparent_blank.gif" BORDER=0 WIDTH=1 HEIGHT=1><BR> <..." Line: 76 Column: 1 - 66
"...#000000"> <img src="images/transparent_blank.gif" BORDER=0 WIDTH=1 HEIGHT=1><BR> <..." Line: 79 Column: 1 - 69
"..."center"> <img src="images/transparent_blank.gif" BORDER=0 WIDTH=900 HEIGHT=10><BR> <..." Line: 82 Column: 1 - 66
"...#000000"> <img src="images/transparent_blank.gif" BORDER=0 WIDTH=1 HEIGHT=1><BR> <..." Line: 88 Column: 1 - 66
"...#000000"> <img src="images/transparent_blank.gif" BORDER=0 WIDTH=1 HEIGHT=1><BR> <..." Line: 104 Column: 1 - 66
"...#000000"> <img src="images/transparent_blank.gif" BORDER=0 WIDTH=1 HEIGHT=1><BR> <..." Line: 111 Column: 1 - 66
"...#000000"> <img src="images/transparent_blank.gif" BORDER=0 WIDTH=1 HEIGHT=1><BR> <..." Line: 115 Column: 1 - 66
"...#FEE1A7"> <img src="images/transparent_blank.gif" BORDER=0 WIDTH=5 HEIGHT=1><BR> <..." Line: 119 Column: 1 - 68
"...#FEE1A7"> <img src="images/transparent_blank.gif" BORDER=0 WIDTH=220 HEIGHT=1><BR> <..." Line: 220 Column: 1 - 66
"...#FEE1A7"> <img src="images/transparent_blank.gif" BORDER=0 WIDTH=5 HEIGHT=1><BR> <..." Line: 225 Column: 1 - 66
"...#FFFFFF"> <img src="images/transparent_blank.gif" BORDER=0 WIDTH=7 HEIGHT=1><BR> <..." Line: 229 Column: 1 - 68
"...th=635> <img src="images/transparent_blank.gif" BORDER=0 WIDTH=635 HEIGHT=1><BR> <..." Line: 231 Column: 38 - 112
"..."#946300"><IMG SRC="images/arrow.gif" BORDER=0 WIDTH=20 HEIGHT=20" ALIGN="ABSMIDDLE"> WELCO..." Line: 248 Column: 1 - 66
".../I>).<BR> <img src="images/transparent_blank.gif" BORDER=0 WIDTH=1 HEIGHT=5><BR> H..." Line: 250 Column: 1 - 66
"...erns.<BR> <img src="images/transparent_blank.gif" BORDER=0 WIDTH=1 HEIGHT=5><BR> D..." Line: 252 Column: 1 - 66
"...e).<BR> <img src="images/transparent_blank.gif" BORDER=0 WIDTH=1 HEIGHT=5><BR> T..." Line: 311 Column: 1 - 66
"...#FFFFFF"> <img src="images/transparent_blank.gif" BORDER=0 WIDTH=8 HEIGHT=1><BR> <..." Line: 315 Column: 1 - 66
"...#000000"> <img src="images/transparent_blank.gif" BORDER=0 WIDTH=1 HEIGHT=1><BR> <..." Line: 323 Column: 1 - 66
"...#000000"> <img src="images/transparent_blank.gif" BORDER=0 WIDTH=1 HEIGHT=1><BR> <..."

Attribute “value” not allowed on element “input” at this point.

Line: 32 Column: 1 - 114
"...his);" /> <input type="image" src="images/search.gif" value="SEARCH" WIDTH="57" HEIGHT="22" border="0" align="absmiddle" /> <inpu..."

Attribute “border” not allowed on element “input” at this point.

Line: 32 Column: 1 - 114
"...his);" /> <input type="image" src="images/search.gif" value="SEARCH" WIDTH="57" HEIGHT="22" border="0" align="absmiddle" /> <inpu..."

Element “input” is missing required attribute “alt”.

Line: 32 Column: 1 - 114
"...his);" /> <input type="image" src="images/search.gif" value="SEARCH" WIDTH="57" HEIGHT="22" border="0" align="absmiddle" /> <inpu..."

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

Line: 32 Column: 1 - 114
"...his);" /> <input type="image" src="images/search.gif" value="SEARCH" WIDTH="57" HEIGHT="22" border="0" align="absmiddle" /> <inpu..."

Stray end tag “form”.

Line: 57 Column: 6 - 7
".../td> </tr> </form> </tab..." Line: 57 Column: 6 - 7
".../td> </tr> </form> </tab..."

The “name” attribute on the “img” element is obsolete. Use the “id” attribute instead.

Line: 66 Column: 84 - 167
"...('img1')"><img NAME="img1" src="images/menu_home.gif" BORDER=0 WIDTH=100 HEIGHT=30 ALT="Home"></A><A..." Line: 66 Column: 255 - 359
"...('img2')"><img NAME="img2" src="images/menu_story.gif" BORDER=0 WIDTH=150 HEIGHT=30 ALT="The Story of Mathematics"></A><A..." Line: 66 Column: 456 - 577
"...('img3')"><img NAME="img3" src="images/menu_mathematicians.gif" BORDER=0 WIDTH=240 HEIGHT=30 ALT="List of Important Mathematicians"></A><A..." Line: 66 Column: 668 - 781
"...('img4')"><img NAME="img4" src="images/menu_glossary.gif" BORDER=0 WIDTH=150 HEIGHT=30 ALT="Glossary of Mathematical Terms"></A><A..." Line: 66 Column: 871 - 960
"...('img5')"><img NAME="img5" src="images/menu_sources.gif" BORDER=0 WIDTH=135 HEIGHT=30 ALT="Sources"></A><A..." Line: 66 Column: 1065 - 1154
"...('img6')"><img NAME="img6" src="images/menu_contact.gif" BORDER=0 WIDTH=125 HEIGHT=30 ALT="Contact"></A><B..."

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

Line: 120 Column: 1 - 47
"...HT=1><BR> <FONT SIZE=3 FACE="Arial,Helvetica,Sans Serif"> <P><B..." Line: 123 Column: 1 - 47
"...> </FONT> <FONT SIZE=2 FACE="Arial,Helvetica,Sans Serif"> <ul ..." Line: 230 Column: 1 - 47
"...HT=1><BR> <FONT SIZE=2 FACE="Arial,Helvetica,Sans Serif"> <P><B..." Line: 231 Column: 7 - 37
"...f"> <P><B><FONT SIZE="4" COLOR="#946300"><IMG S..." Line: 239 Column: 1 - 47
"...#946300"> <FONT SIZE=2 FACE="Arial,Helvetica,Sans Serif"> <B>..." Line: 246 Column: 1 - 47
"...#FFF3D9"> <FONT SIZE=2 FACE="Arial,Helvetica,Sans Serif"> Mat..." Line: 271 Column: 1 - 47
"...GN="TOP"> <FONT SIZE=2 FACE="Arial,Helvetica,Sans Serif"> Thi..." Line: 288 Column: 1 - 47
"... <CENTER> <FONT SIZE=1 FACE="Arial,Helvetica,Sans Serif"><B> ..." Line: 301 Column: 1 - 63
"... <CENTER> <FONT SIZE=1 COLOR="#666666" FACE="Arial,Helvetica,Sans Serif"><B> ..."

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

Line: 121 Column: 1 - 3
"...s Serif"> <P><B><A ..." Line: 231 Column: 1 - 3
"...s Serif"> <P><B><FO..." Line: 263 Column: 1 - 3
"...here --> <P>The hi..." Line: 264 Column: 1 - 3
"...oday.</P> <P>From t..." Line: 265 Column: 1 - 3
"... one.</P> <P>The Ea..." Line: 266 Column: 1 - 3
"...</A>.</P> <P>Follow..." Line: 281 Column: 1 - 3
"...able --> <P>The ma..."

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

Line: 125 Column: 1 - 20
"... Serif"> <ul id="navigation"> <li>..."

Malformed byte sequence: “93”.

Line: 247 Column: - 31
"......"

Malformed byte sequence: “94”.

Line: 247 Column: - 209
"......"

“"” in an unquoted attribute value. Probable causes: Attributes running together or a URL query string in an unquoted attribute value.

Line: 231 Column: - 93
"...TH=20 HEIGHT=20" ALIGN="ABSMID..."

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

Line: 231 Column: 38 - 112
"..."#946300"><IMG SRC="images/arrow.gif" BORDER=0 WIDTH=20 HEIGHT=20" ALIGN="ABSMIDDLE"> WELCO..."

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

Line: 234 Column: 1 - 86
"...Table --> <TABLE BORDER=0 WIDTH=320 CELLSPACING=0 CELLPADDING=2 ALIGN="RIGHT" BGCOLOR="#946300"><TR> <..." Line: 269 Column: 1 - 89
"...Table --> <TABLE BORDER=0 WIDTH="90%" CELLSPACING=0 CELLPADDING=5 BGCOLOR="#FFF3D9" ALIGN="CENTER"><TR> <..."

The “clear” attribute on the “br” element is obsolete. Use CSS instead.

Line: 266 Column: 297 - 312
"...S</A></B>.<BR CLEAR="ALL"></P> ..."

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

Line: 287 Column: 1 - 8
"... --> <CENTER> <FONT..." Line: 300 Column: 1 - 8
"...nbsp;<BR> <CENTER> <FONT..."

Warnings

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

Line: 9 Column: 1 - 75
"...on.ico" > <SCRIPT LANGUAGE="JavaScript" TYPE="text/javascript" SRC="random_image.js"></SCRI..." Line: 10 Column: 1 - 67
"...</SCRIPT> <SCRIPT LANGUAGE="JavaScript" TYPE="text/javascript" SRC="menu.js"></SCRI..." Line: 91 Column: 1 - 30
"..."center"> <script language="JavaScript"> <!-- ..."

The “name” attribute is obsolete. Consider putting an “id” attribute on the nearest container instead.

Line: 17 Column: 1 - 14
"...h=0> <A NAME="Top"></A> ..."

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

Line: 23 Column: 1 - 66
"...#000000"> <img src="images/transparent_blank.gif" BORDER=0 WIDTH=1 HEIGHT=1><BR> <..." Line: 28 Column: 1 - 88
"..."center"> <img src="images/logo.gif" BORDER=0 WIDTH=700 HEIGHT=130 ALT="The Story of Mathematics"><BR> <..." Line: 49 Column: 1 - 68
"...ue="1" /> <img src="images/transparent_blank.gif" BORDER=0 WIDTH=200 HEIGHT=5><BR> <..." Line: 54 Column: 1 - 66
"...#000000"> <img src="images/transparent_blank.gif" BORDER=0 WIDTH=1 HEIGHT=1><BR> <..." Line: 63 Column: 1 - 66
"...#000000"> <img src="images/transparent_blank.gif" BORDER=0 WIDTH=1 HEIGHT=1><BR> <..." Line: 66 Column: 84 - 167
"...('img1')"><img NAME="img1" src="images/menu_home.gif" BORDER=0 WIDTH=100 HEIGHT=30 ALT="Home"></A><A..." Line: 66 Column: 255 - 359
"...('img2')"><img NAME="img2" src="images/menu_story.gif" BORDER=0 WIDTH=150 HEIGHT=30 ALT="The Story of Mathematics"></A><A..." Line: 66 Column: 456 - 577
"...('img3')"><img NAME="img3" src="images/menu_mathematicians.gif" BORDER=0 WIDTH=240 HEIGHT=30 ALT="List of Important Mathematicians"></A><A..." Line: 66 Column: 668 - 781
"...('img4')"><img NAME="img4" src="images/menu_glossary.gif" BORDER=0 WIDTH=150 HEIGHT=30 ALT="Glossary of Mathematical Terms"></A><A..." Line: 66 Column: 871 - 960
"...('img5')"><img NAME="img5" src="images/menu_sources.gif" BORDER=0 WIDTH=135 HEIGHT=30 ALT="Sources"></A><A..." Line: 66 Column: 1065 - 1154
"...('img6')"><img NAME="img6" src="images/menu_contact.gif" BORDER=0 WIDTH=125 HEIGHT=30 ALT="Contact"></A><B..." Line: 69 Column: 1 - 66
"...#000000"> <img src="images/transparent_blank.gif" BORDER=0 WIDTH=1 HEIGHT=1><BR> <..." Line: 76 Column: 1 - 66
"...#000000"> <img src="images/transparent_blank.gif" BORDER=0 WIDTH=1 HEIGHT=1><BR> <..." Line: 79 Column: 1 - 69
"..."center"> <img src="images/transparent_blank.gif" BORDER=0 WIDTH=900 HEIGHT=10><BR> <..." Line: 82 Column: 1 - 66
"...#000000"> <img src="images/transparent_blank.gif" BORDER=0 WIDTH=1 HEIGHT=1><BR> <..." Line: 88 Column: 1 - 66
"...#000000"> <img src="images/transparent_blank.gif" BORDER=0 WIDTH=1 HEIGHT=1><BR> <..." Line: 104 Column: 1 - 66
"...#000000"> <img src="images/transparent_blank.gif" BORDER=0 WIDTH=1 HEIGHT=1><BR> <..." Line: 111 Column: 1 - 66
"...#000000"> <img src="images/transparent_blank.gif" BORDER=0 WIDTH=1 HEIGHT=1><BR> <..." Line: 115 Column: 1 - 66
"...#FEE1A7"> <img src="images/transparent_blank.gif" BORDER=0 WIDTH=5 HEIGHT=1><BR> <..." Line: 119 Column: 1 - 68
"...#FEE1A7"> <img src="images/transparent_blank.gif" BORDER=0 WIDTH=220 HEIGHT=1><BR> <..." Line: 220 Column: 1 - 66
"...#FEE1A7"> <img src="images/transparent_blank.gif" BORDER=0 WIDTH=5 HEIGHT=1><BR> <..." Line: 225 Column: 1 - 66
"...#FFFFFF"> <img src="images/transparent_blank.gif" BORDER=0 WIDTH=7 HEIGHT=1><BR> <..." Line: 229 Column: 1 - 68
"...th=635> <img src="images/transparent_blank.gif" BORDER=0 WIDTH=635 HEIGHT=1><BR> <..." Line: 231 Column: 38 - 112
"..."#946300"><IMG SRC="images/arrow.gif" BORDER=0 WIDTH=20 HEIGHT=20" ALIGN="ABSMIDDLE"> WELCO..." Line: 248 Column: 1 - 66
".../I>).<BR> <img src="images/transparent_blank.gif" BORDER=0 WIDTH=1 HEIGHT=5><BR> H..." Line: 250 Column: 1 - 66
"...erns.<BR> <img src="images/transparent_blank.gif" BORDER=0 WIDTH=1 HEIGHT=5><BR> D..." Line: 252 Column: 1 - 66
"...e).<BR> <img src="images/transparent_blank.gif" BORDER=0 WIDTH=1 HEIGHT=5><BR> T..." Line: 311 Column: 1 - 66
"...#FFFFFF"> <img src="images/transparent_blank.gif" BORDER=0 WIDTH=8 HEIGHT=1><BR> <..." Line: 315 Column: 1 - 66
"...#000000"> <img src="images/transparent_blank.gif" BORDER=0 WIDTH=1 HEIGHT=1><BR> <..." Line: 323 Column: 1 - 66
"...#000000"> <img src="images/transparent_blank.gif" BORDER=0 WIDTH=1 HEIGHT=1><BR> <..."

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

Line: 1 Column: 1 - 6
"...<HTML> <HE..."

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STORYOFMATHEMATICS.COM The Story of Mathematics - A History of Mathematical Thought from Ancient Times to the Modern Day

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