Mvvainc.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.
Bad value “imagetoolbar” for attribute “http-equiv” on element “meta”.
Quote “"” in attribute name. Probable cause: Matching quote missing somewhere earlier.
Attribute “media-"screen"” not allowed on element “link” at this point.
Bad value “100%” for attribute “width” on element “img”: Expected a digit but saw “%” instead.
Attribute “caption” not allowed on element “img” 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.
Warnings:
Attribute “media-"screen"” is not serializable as XML 1.0.
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