21vianet.com W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Almost standards mode doctype. Expected “<!DOCTYPE html>”.
When the attribute “xml:lang” in no namespace is specified, the element must also have the attribute “lang” present with the same value.
A “meta” element with an “http-equiv” attribute whose value is “X-UA-Compatible” must have a “content” attribute with the value “IE=edge”.
Attribute “onselectstart” not allowed on element “body” 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.
Attribute “layout” not allowed on element “img” at this point.
Element “style” not allowed as child of element “form” in this context. (Suppressing further errors from this subtree.)
Bad value “tel:400 651 9966” for attribute “href” on element “a”: Illegal character in scheme data: space is not allowed.
Warnings:
Consider avoiding viewport values that prevent users from resizing documents.
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