Coolmath4kids.com W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
When the attribute “xml:lang” in no namespace is specified, the element must also have the attribute “lang” present with the same value.
The “version” attribute on the “html” element is obsolete. You can safely omit it.
The “profile” attribute on the “head” element is obsolete. To declare which “meta” terms are used in the document, instead register the names as meta extensions. To trigger specific UA behaviors, use a “link” element instead.
A document must not include both a “meta” element with an “http-equiv” attribute whose value is “content-type”, and a “meta” element with a “charset” attribute.
Bad value “182px” for attribute “width” on element “img”: Expected a digit but saw “p” instead.
Bad value “126px” for attribute “height” on element “img”: Expected a digit but saw “p” instead.
Bad value “72,112,96,78” for attribute “coords” on element “area”: The second integer must be less than the fourth.
Bad value “224px” for attribute “width” on element “img”: Expected a digit but saw “p” instead.
Bad value “57px” for attribute “height” on element “img”: Expected a digit but saw “p” instead.
Element “div” not allowed as child of element “ul” in this context. (Suppressing further errors from this subtree.)
Bad value “248px” for attribute “width” on element “img”: Expected a digit but saw “p” instead.
Bad value “67px” for attribute “height” on element “img”: Expected a digit but saw “p” instead.
Warnings:
Empty heading.
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