Errors:
Legacy encoding “windows-1251” used. Documents must use UTF-8.
Quirky doctype. Expected “<!DOCTYPE html>”.
Element “link” is missing one or more of the following attributes: “itemprop”, “property”, “rel”.
Bad value “text/html; charset=windows-1251” for attribute “content” on element “meta”: “charset=” must be followed by “utf-8”.
Bad value “expires” for attribute “http-equiv” on element “meta”.
Bad value “pragma” for attribute “http-equiv” on element “meta”.
Attribute “cols” not allowed on element “frameset” at this point.
Attribute “border” not allowed on element “frameset” at this point.
Attribute “bordercolor” not allowed on element “frameset” at this point.
Attribute “frameborder” not allowed on element “frameset” at this point.
The “frameset” element is obsolete. Use the “iframe” element and CSS instead, or use server-side includes.
Attribute “framespacing” not allowed on element “frameset” at this point.
Attribute “framespacing” not allowed on element “frame” at this point.
Element “noframes” not allowed as child of element “html” in this context. (Suppressing further errors from this subtree.)
The “noframes” element is obsolete. Use the “iframe” element and CSS instead, or use server-side includes.
Warnings:
Consider adding a “lang” attribute to the “html” start tag to declare the language of this document.
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