Infobox.ru W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Element “style” not allowed as child of element “div” in this context. (Suppressing further errors from this subtree.)
Bad value “” for attribute “for” on element “label”: An ID must not be the empty string.
Saw “<?”. Probable cause: Attempt to use an XML processing instruction in HTML. (XML processing instructions are not supported in HTML.)
Attribute “for” not allowed on element “span” at this point.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Bad value “http:/www.odin.com/” for attribute “href” on element “a”: Expected a slash ("/").
Element “style” not allowed as child of element “body” in this context. (Suppressing further errors from this subtree.)
CSS: “backdrop-filter”: Property “backdrop-filter” doesn't exist.
The value of the “for” attribute of the “label” element must be the ID of a non-hidden form control.
Warnings:
The “type” attribute is unnecessary for JavaScript resources.
This document appears to be written in Russian. Consider adding “lang="ru"” (or variant) to the “html” start tag.
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