Errors:
Obsolete doctype. Expected “<!DOCTYPE html>”.
Internal encoding declaration “iso-8859-1” disagrees with the actual encoding of the document (“utf-8”).
Bad value “text/html; charset=iso-8859-1” for attribute “content” on element “meta”: “iso-8859-1” is not a preferred encoding name. The preferred label for this encoding is “windows-1252”.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Attribute “pattern” is only allowed when the input type is “email”, “password”, “search”, “tel”, “text”, or “url”.
Malformed byte sequence: “eb”.
Stray doctype.
Stray start tag “html”.
Stray start tag “head”.
Attribute “http-equiv” not allowed on element “meta” at this point.
Element “meta” is missing one or more of the following attributes: “itemprop”, “property”.
A document must not include more than one “meta” element with a “http-equiv” attribute whose value is “content-type”.
Attribute “name” not allowed on element “meta” at this point.
Element “base” not allowed as child of element “div” in this context. (Suppressing further errors from this subtree.)
Element “title” not allowed as child of element “div” in this context. (Suppressing further errors from this subtree.)
A “link” element must not appear as a descendant of a “body” element unless the “link” element has an “itemprop” attribute or has a “rel” attribute whose value contains “dns-prefetch”, “pingback”, “preconnect”, “prefetch”, “preload”, “prerender”, or “stylesheet”.
Stray end tag “head”.
Start tag “body” seen but an element of the same type was already open.
Duplicate ID “tekst”.
End tag for “body” seen, but there were unclosed elements.
Unclosed element “div”.
Stray end tag “div”.
The element “label” must not appear as a descendant of the “label” element.
Element “option” without attribute “label” must not be empty.
Duplicate ID “zcilinder_aantal”.
Duplicate ID “t000000”.
Duplicate ID “li-topmenu1”.
Duplicate ID “topmenu1”.
Duplicate ID “m000013”.
Duplicate ID “li-topmenu2”.
Duplicate ID “topmenu2”.
Duplicate ID “m000920”.
Duplicate ID “li-topmenu3”.
Duplicate ID “topmenu3”.
Duplicate ID “li-topmenu4”.
Duplicate ID “topmenu4”.
Duplicate ID “m002098”.
Duplicate ID “li-topmenu5”.
Duplicate ID “topmenu5”.
Duplicate ID “m001254”.
Malformed byte sequence: “a9”.
Warnings:
Consider avoiding viewport values that prevent users from resizing documents.
The “name” attribute is obsolete. Consider putting an “id” attribute on the nearest container instead.
Empty heading.
The first occurrence of ID “tekst” was here.
The first occurrence of ID “zcilinder_aantal” was here.
The first occurrence of ID “t000000” was here.
The first occurrence of ID “li-topmenu1” was here.
The first occurrence of ID “topmenu1” was here.
The first occurrence of ID “m000013” was here.
The first occurrence of ID “li-topmenu2” was here.
The first occurrence of ID “topmenu2” was here.
The first occurrence of ID “m000920” was here.
The first occurrence of ID “li-topmenu3” was here.
The first occurrence of ID “topmenu3” was here.
The first occurrence of ID “li-topmenu4” was here.
The first occurrence of ID “topmenu4” was here.
The first occurrence of ID “m002098” was here.
The first occurrence of ID “li-topmenu5” was here.
The first occurrence of ID “topmenu5” was here.
The first occurrence of ID “m001254” was here.
Netherlands NL