Fernbankmuseum.org W3C HTML Markup Validation
HTML markup errors and warnings
(Rescan now...)
Warnings:
The “region” role is unnecessary for element “section”.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
The first occurrence of ID “siteFooter” was here.
Errors:
Element “button” not allowed as child of element “ul” in this context. (Suppressing further errors from this subtree.)
Bad value “100%” for attribute “width” on element “img”: Expected a digit but saw “%” instead.
The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.
Duplicate ID “siteFooter”.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Bad value “100%” for attribute “width” on element “iframe”: Expected a digit but saw “%” instead.
The “align” attribute on the “p” element is obsolete. Use CSS instead.
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