Errors:
Almost standards mode 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).
Start tag “head” seen but an element of the same type was already open.
Duplicate ID “sitename”.
Duplicate ID “mainmenu”.
The “width” attribute on the “table” element is obsolete. Use CSS instead.
The “width” attribute on the “th” element is obsolete. Use CSS instead.
The “width” attribute on the “td” element is obsolete.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.
The “cellspacing” attribute on the “table” element is obsolete. Use CSS instead.
The “cellpadding” attribute on the “table” element is obsolete. Use CSS instead.
The “border” attribute on the “table” element is obsolete. Use CSS instead.
The “height” attribute on the “td” element is obsolete. Use CSS instead.
The “valign” attribute on the “td” element is obsolete. Use CSS instead.
The “align” attribute on the “td” element is obsolete. Use CSS instead.
Stray end tag “a”.
Warnings:
Attribute “xmlns” is not serializable as XML 1.0.
The “type” attribute is unnecessary for JavaScript resources.
The first occurrence of ID “sitename” was here.
The first occurrence of ID “mainmenu” was here.
The “border” attribute is obsolete. Consider specifying “img { border: 0; }” in CSS instead.
This document appears to be written in Russian. Consider adding “lang="ru"” (or variant) to the “html” start tag.
Ukraine UA