Superstep.ru W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Bad start tag in “img” in “head”.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Stray end tag “noscript”.
Stray end tag “head”.
Start tag “body” seen but an element of the same type was already open.
Bad value “” for attribute “action” on element “form”: Must be non-empty.
Duplicate attribute “name”.
Attribute “alt” not allowed on element “a” at this point.
Duplicate ID “children”.
End tag “a” violates nesting rules.
Element “noindex” not allowed as child of element “div” in this context. (Suppressing further errors from this subtree.)
Element “input” with attribute “type” whose value is “button” must have non-empty attribute “value”.
Bad value “true” for attribute “async” on element “script”.
Warnings:
The first occurrence of ID “children” was here.
Text run is not in Unicode Normalization Form C.
This document appears to be written in Russian. Consider adding “lang="ru"” (or variant) to the “html” start tag.
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