F5-online.ru W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
A “meta” element with an “http-equiv” attribute whose value is “X-UA-Compatible” must have a “content” attribute with the value “IE=edge”.
Duplicate ID “register-link”.
Duplicate ID “login-link”.
Bad value “http://www.f5-online.ru/images/shares/1535370619.для сайта 3.png” for attribute “src” on element “img”: Illegal character in path segment: space is not allowed.
Bad value “http://www.f5-online.ru/images/shares/1535364648.для сайта 2.png” for attribute “src” on element “img”: Illegal character in path segment: space is not allowed.
Bad value “http://www.f5-online.ru/images/shares/1535363789.для сайта 1.png” for attribute “src” on element “img”: Illegal character in path segment: space is not allowed.
Bad character “<” after “<”. Probable cause: Unescaped “<”. Try escaping it as “<”.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
The “for” attribute of the “label” element must refer to a non-hidden form control.
Warnings:
The “border” attribute is obsolete. Consider specifying “img { border: 0; }” in CSS instead.
The first occurrence of ID “register-link” was here.
The first occurrence of ID “login-link” was here.
This document appears to be written in Russian but the “html” start tag has an empty “lang” attribute. Consider using “lang="ru"” (or variant) instead.
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