Glogster.com W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Using the “meta” element to specify the document-wide default language is obsolete. Consider specifying the language on the root element instead.
Bad value “button” for attribute “type” on element “a”: Subtype missing.
Stray end tag “a”.
Bad value “http://edu.glogster.com/glogpedia?order=updated&discipline=182&=glogpedia-navigate-Social Studies” for attribute “href” on element “a”: Illegal character in query: space is not allowed.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Bad value “” for attribute “src” on element “img”: Must be non-empty.
Duplicate ID “Layer_1”.
The “aria-labelledby” attribute must point to an element in the same document.
Warnings:
Consider using the “h1” element as a top-level heading only (all “h1” elements are treated as top-level headings by many screen readers and other tools).
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
Article lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all articles.
The first occurrence of ID “Layer_1” was here.
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