Phys.org W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Bad value “Keywords” for attribute “http-equiv” on element “meta”.
Attribute “name” not allowed on element “meta” at this point.
Bad value “Description” for attribute “http-equiv” on element “meta”.
Using the “meta” element to specify the document-wide default language is obsolete. Consider specifying the language on the root element instead.
Bad value “top” for attribute “rel” on element “link”: The string “top” is not a registered keyword.
Attribute “rel” not allowed on element “img” at this point.
The “align” attribute on the “img” element is obsolete. Use CSS instead.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Duplicate ID “menu-wrap”.
Warnings:
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
Consider using the “h1” element as a top-level heading only (all “h1” elements are treated as top-level headings by many screen readers and other tools).
The first occurrence of ID “menu-wrap” was here.
The “border” attribute is obsolete. Consider specifying “img { border: 0; }” in CSS instead.
This document appears to be written in English. Consider adding “lang="en"” (or variant) to the “html” start tag.
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