C-inform.info W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Obsolete doctype. Expected “<!DOCTYPE html>”.
Bad value “http://www.w3.org/1999/html” for the attribute “xmlns” (only “http://www.w3.org/1999/xhtml” permitted here).
Element “script” must not have attribute “async” unless attribute “src” is also specified.
No space between attributes.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Bad value “adv ” for attribute “id” on element “a”: An ID must not contain whitespace.
Element “input” is missing required attribute “alt”.
The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.
The “scrolling” attribute on the “iframe” element is obsolete. Use CSS instead.
Text not allowed in element “iframe” in this context.
Duplicate ID “adv”.
Bad value “javascript://” for attribute “href” on element “a”: missing } after function body
Warnings:
Attribute “xmlns” is not serializable as XML 1.0.
The first occurrence of ID “adv” 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The “border” attribute is obsolete.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.
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