Errors:
Legacy doctype. Expected “<!DOCTYPE html>”.
Bad value “https://www.w3.org/1999/xhtml” for the attribute “xmlns” (only “http://www.w3.org/1999/xhtml” permitted here).
A document must not include both a “meta” element with an “http-equiv” attribute whose value is “content-type”, and a “meta” element with a “charset” attribute.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Attribute “type” not allowed on element “select” at this point.
Duplicate ID “header-img”.
Row 1 of a row group established by a “tbody” element has no cells beginning on it.
Element “h3” not allowed as child of element “span” in this context. (Suppressing further errors from this subtree.)
Bad value “75px” for attribute “width” on element “img”: Expected a digit but saw “p” instead.
CSS: “border”: Parse Error.
End tag “li” seen, but there were open elements.
Unclosed element “div”.
Warnings:
Attribute “xmlns” is not serializable as XML 1.0.
The “type” attribute is unnecessary for JavaScript resources.
The first occurrence of ID “header-img” 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The “border” attribute is obsolete.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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