Otto.ru W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Start tag seen without seeing a doctype first. Expected “<!DOCTYPE html>”.
CSS: “margin”: only “0” can be a “unit”. You must put a unit after your number.
Element “head” is missing a required instance of child element “title”.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
End tag “div” seen, but there were open elements.
Unclosed element “span”.
The element “input” must not appear as a descendant of the “a” element.
Warnings:
The “type” attribute for the “style” element is not needed and should be omitted.
This document appears to be written in Russian. Consider adding “lang="ru"” (or variant) to the “html” start tag.
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