Warnings:
Consider avoiding viewport values that prevent users from resizing documents.
The “type” attribute is unnecessary for JavaScript resources.
The first occurrence of ID “Shape” was here.
The first occurrence of ID “Oval-5” was here.
The first occurrence of ID “Symbols” was here.
The first occurrence of ID “header” was here.
The first occurrence of ID “Group” was here.
The first occurrence of ID “2” was here.
The first occurrence of ID “ico” was here.
The first occurrence of ID “main-menu” was here.
The first occurrence of ID “drop-menu” was here.
The first occurrence of ID “Каталог” was here.
The first occurrence of ID “Path-3” was here.
The first occurrence of ID “Расчет” was here.
The first occurrence of ID “Визуальный” was here.
The first occurrence of ID “Монтаж” was here.
The first occurrence of ID “Group-8” was here.
The first occurrence of ID “Rectangle-4” was here.
The first occurrence of ID “Line-16” was here.
“label” element with multiple labelable descendants.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
The first occurrence of ID “m_Header” was here.
The first occurrence of ID “up” was here.
The first occurrence of ID “search” was here.
The first occurrence of ID “Oval” was here.
The first occurrence of ID “Line” was here.
The first occurrence of ID “1” was here.
The first occurrence of ID “features” was here.
The first occurrence of ID “Path-2” was here.
The first occurrence of ID “Desk” was here.
The first occurrence of ID “Home” was here.
The first occurrence of ID “hits” was here.
The first occurrence of ID “tabs” was here.
The first occurrence of ID “all” was here.
The document is not mappable to XML 1.0 due to two consecutive hyphens in a comment.
The first occurrence of ID “footer” was here.
The first occurrence of ID “Footer” was here.
This document appears to be written in Russian. Consider adding “lang="ru"” (or variant) to the “html” start tag.
Errors:
Bad value “2” for attribute “id” on element “g”: Not a valid XML 1.0 name.
Duplicate ID “Shape”.
Duplicate ID “Oval-5”.
Duplicate ID “Symbols”.
Duplicate ID “header”.
Duplicate ID “Group”.
Duplicate ID “2”.
Duplicate ID “ico”.
Duplicate ID “main-menu”.
Duplicate ID “drop-menu”.
Duplicate ID “Каталог”.
Duplicate ID “Path-3”.
Duplicate ID “Расчет”.
Duplicate ID “Визуальный”.
Duplicate ID “Монтаж”.
Duplicate ID “Group-8”.
Duplicate ID “Rectangle-4”.
Duplicate ID “Line-16”.
The “label” element may contain at most one “button”, “input”, “meter”, “output”, “progress”, “select”, or “textarea” descendant.
Any “button” descendant of a “label” element with a “for” attribute must have an ID value that matches that “for” attribute.
Bad value “1” for attribute “id” on element “g”: Not a valid XML 1.0 name.
Element “option” without attribute “label” must not be empty.
Duplicate ID “m_Header”.
Duplicate ID “up”.
Duplicate ID “search”.
Duplicate ID “Oval”.
Duplicate ID “Line”.
Bad value “true” for attribute “autoplay” on element “video”.
Bad value “true” for attribute “muted” on element “video”.
Bad value “true” for attribute “loop” on element “video”.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Element “noindex” not allowed as child of element “div” in this context. (Suppressing further errors from this subtree.)
Duplicate ID “1”.
Duplicate ID “features”.
Duplicate ID “Path-2”.
Duplicate ID “Desk”.
Duplicate ID “Home”.
Duplicate ID “hits”.
Duplicate ID “tabs”.
Duplicate ID “all”.
Element “dt” not allowed as child of element “a” in this context. (Suppressing further errors from this subtree.)
Duplicate ID “footer”.
Duplicate ID “Footer”.