Errors:
Legacy doctype. Expected “<!DOCTYPE html>”.
When the attribute “xml:lang” in no namespace is specified, the element must also have the attribute “lang” present with the same value.
The “version” attribute on the “html” element is obsolete. You can safely omit it.
The “profile” attribute on the “head” element is obsolete. To declare which “meta” terms are used in the document, instead register the names as meta extensions. To trigger specific UA behaviors, use a “link” element instead.
A document must not include more than one “meta” element with a “http-equiv” attribute whose value is “content-type”.
Bad value for attribute “href” on element “link”: Illegal character in query: “|” is not allowed.
CSS: “background”: Lexical error at line 143, column 19. Encountered: ";" (59), after : "#".
CSS: “background”: Parse Error.
Bad value “tooltip” for attribute “rel” on element “a”: The string “tooltip” is not a registered keyword.
Attribute “border” not allowed on element “input” at this point.
Attribute “a” not allowed on element “input” at this point.
Element “input” is missing required attribute “alt”.
Duplicate ID “nav”.
The “center” element is obsolete. Use CSS instead.
Bad value “100%” for attribute “width” on element “iframe”: Expected a digit but saw “%” instead.
Bad value “320px” for attribute “height” on element “iframe”: Expected a digit but saw “p” instead.
The “frameborder” attribute on the “iframe” element is obsolete.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.
Warnings:
The “type” attribute for the “style” element is not needed and should be omitted.
The “type” attribute is unnecessary for JavaScript resources.
The first occurrence of ID “nav” 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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