Quartoknows.com W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Element “link” is missing one or more of the following attributes: “itemprop”, “property”, “rel”.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Bad value “” for attribute “name” on element “input”: Must not be empty.
Bad value “” for attribute “id” on element “input”: An ID must not be the empty string.
End tag “li” seen, but there were open elements.
Unclosed element “div”.
Duplicate ID “main_menu_blog”.
Named character reference was not terminated by a semicolon. (Or “&” should have been escaped as “&”.)
Warnings:
Empty heading.
The “language” attribute on the “script” element is obsolete. You can safely omit it.
The “navigation” role is unnecessary for element “nav”.
The first occurrence of ID “main_menu_blog” was here.
This document appears to be written in English. Consider adding “lang="en"” (or variant) to the “html” start tag.
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