Qub.ac.uk W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Duplicate ID “menu”.
End tag “ul” seen, but there were open elements.
Unclosed element “nav”.
Stray end tag “ul”.
Stray end tag “nav”.
Element “div” not allowed as child of element “ul” in this context. (Suppressing further errors from this subtree.)
Attribute “alt” not allowed on element “button” at this point.
No “li” element in scope but a “li” end tag seen.
End tag “header” seen, but there were open elements.
Unclosed element “div”.
Element “style” not allowed as child of element “main” in this context. (Suppressing further errors from this subtree.)
Element “style” not allowed as child of element “article” in this context. (Suppressing further errors from this subtree.)
The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.
Bad value “_new” for attribute “target” on element “a”: Reserved keyword “new” used.
The element “header” must not appear as a descendant of the “footer” element.
Element “a” not allowed as child of element “ul” in this context. (Suppressing further errors from this subtree.)
Element “style” not allowed as child of element “div” in this context. (Suppressing further errors from this subtree.)
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Warnings:
The first occurrence of ID “menu” was here.
The “main” role is unnecessary for element “main”.
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