Errors:
Using the “meta” element to specify the document-wide default language is obsolete. Consider specifying the language on the root element instead.
Duplicate attribute “style”.
End tag “nav” seen, but there were open elements.
Unclosed element “div”.
Duplicate ID “ad-top_leaderboard”.
End tag “div” seen, but there were open elements.
Unclosed element “header”.
Stray end tag “header”.
Element “div” not allowed as child of element “h3” in this context. (Suppressing further errors from this subtree.)
Duplicate ID “box_header_title_artikel”.
The “allowtransparency” attribute on the “iframe” element is obsolete. Use CSS instead.
The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.
The “scrolling” attribute on the “iframe” element is obsolete. Use CSS instead.
End tag “main” seen, but there were open elements.
Stray end tag “div”.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
The “itemprop” attribute was specified, but the element is not a property of any item.
Warnings:
The first occurrence of ID “ad-top_leaderboard” was here.
The first occurrence of ID “box_header_title_artikel” was here.
This document appears to be written in Dutch. Consider adding “lang="nl"” (or variant) to the “html” start tag.
Netherlands NL