Errors:
Obsolete doctype. Expected “<!DOCTYPE html>”.
A “meta” element with an “http-equiv” attribute whose value is “X-UA-Compatible” must have a “content” attribute with the value “IE=edge”.
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.
The “width” attribute on the “table” element is obsolete. Use CSS instead.
The “cellpadding” attribute on the “table” element is obsolete. Use CSS instead.
The “cellspacing” attribute on the “table” element is obsolete. Use CSS instead.
The “border” attribute on the “table” element is obsolete. Use CSS instead.
Duplicate ID “__VIEWSTATE”.
The “scrolling” attribute on the “iframe” element is obsolete. Use CSS instead.
The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.
Duplicate ID “_literalHtml”.
Attribute “runat” not allowed on element “h2” at this point.
Duplicate ID “_tableMenu”.
Duplicate ID “_videoHeadline”.
Bad value “175px” for attribute “width” on element “iframe”: Expected a digit but saw “p” instead.
Bad value “180px” for attribute “height” on element “iframe”: Expected a digit but saw “p” instead.
Text not allowed in element “iframe” in this context.
Duplicate ID “__EVENTVALIDATION”.
Self-closing syntax (“/>”) used on a non-void HTML element. Ignoring the slash and treating as a start tag.
Bad value “400px” for attribute “height” on element “iframe”: Expected a digit but saw “p” instead.
Bad value “100%” for attribute “width” on element “iframe”: Expected a digit but saw “%” instead.
End tag for “body” seen, but there were unclosed elements.
Unclosed element “div”.
Warnings:
The “border” attribute is obsolete. Consider specifying “img { border: 0; }” in CSS instead.
Empty heading.
The first occurrence of ID “__VIEWSTATE” was here.
The first occurrence of ID “_literalHtml” was here.
The first occurrence of ID “_tableMenu” was here.
The first occurrence of ID “_videoHeadline” was here.
The first occurrence of ID “__EVENTVALIDATION” was here.
The “button” role is unnecessary for element “button”.
This document appears to be written in Dutch. Consider adding “lang="nl"” (or variant) to the “html” start tag.
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).
Netherlands NL