Warnings:
The “type” attribute is unnecessary for JavaScript resources.
Consider avoiding viewport values that prevent users from resizing documents.
The first occurrence of ID “Kamperen” was here.
The first occurrence of ID “Sporten” was here.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
The first occurrence of ID “gradFull5” was here.
The first occurrence of ID “gradFull4” was here.
The first occurrence of ID “gradFull3” was here.
The first occurrence of ID “gradFull2” was here.
The first occurrence of ID “gradFull1” was here.
The first occurrence of ID “gradEmpty5” was here.
The first occurrence of ID “gradEmpty4” was here.
The first occurrence of ID “gradEmpty3” was here.
The first occurrence of ID “gradEmpty2” was here.
The first occurrence of ID “gradEmpty1” was here.
This document appears to be written in Dutch. Consider adding “lang="nl"” (or variant) to the “html” start tag.
Errors:
Bad value “imagetoolbar” for attribute “http-equiv” on element “meta”.
The element “label” must not appear as a descendant of the “a” element.
Bad value “"checked"” for attribute “checked” on element “input”.
The element “input” must not appear as a descendant of the “a” element.
Bad value “Elektrische fietsen” for attribute “for” on element “label”: An ID must not contain whitespace.
Bad value “Elektrische fietsen” for attribute “id” on element “input”: An ID must not contain whitespace.
Bad value “Sportieve fietsen” for attribute “for” on element “label”: An ID must not contain whitespace.
Bad value “Sportieve fietsen” for attribute “id” on element “input”: An ID must not contain whitespace.
Bad value “Overige fietsen” for attribute “for” on element “label”: An ID must not contain whitespace.
Bad value “Overige fietsen” for attribute “id” on element “input”: An ID must not contain whitespace.
Bad value “Zwembad & strand” for attribute “for” on element “label”: An ID must not contain whitespace.
Bad value “Zwembad & strand” for attribute “id” on element “input”: An ID must not contain whitespace.
Bad value “SPORT & CASUALS” for attribute “for” on element “label”: An ID must not contain whitespace.
Bad value “SPORT & CASUALS” for attribute “id” on element “input”: An ID must not contain whitespace.
Bad value “Casual kleding” for attribute “for” on element “label”: An ID must not contain whitespace.
Bad value “Casual kleding” for attribute “id” on element “input”: An ID must not contain whitespace.
Bad value “Casual schoenen” for attribute “for” on element “label”: An ID must not contain whitespace.
Bad value “Casual schoenen” for attribute “id” on element “input”: An ID must not contain whitespace.
Bad value “Casual accessoires” for attribute “for” on element “label”: An ID must not contain whitespace.
Bad value “Casual accessoires” for attribute “id” on element “input”: An ID must not contain whitespace.
Bad value “Op pad” for attribute “for” on element “label”: An ID must not contain whitespace.
Bad value “Op pad” for attribute “id” on element “input”: An ID must not contain whitespace.
Duplicate ID “Kamperen”.
Duplicate ID “Sporten”.
Bad value “Kleding & schoenen” for attribute “for” on element “label”: An ID must not contain whitespace.
Bad value “Kleding & schoenen” for attribute “id” on element “input”: An ID must not contain whitespace.
Bad value “HOME & GARDEN” for attribute “for” on element “label”: An ID must not contain whitespace.
Bad value “HOME & GARDEN” for attribute “id” on element “input”: An ID must not contain whitespace.
Bad value “Koken & tafelen” for attribute “for” on element “label”: An ID must not contain whitespace.
Bad value “Koken & tafelen” for attribute “id” on element “input”: An ID must not contain whitespace.
Element “ul” not allowed as child of element “ul” in this context. (Suppressing further errors from this subtree.)
Bad value “” for attribute “src” on element “img”: Must be non-empty.
“"” in an unquoted attribute value. Probable causes: Attributes running together or a URL query string in an unquoted attribute value.
Duplicate ID “gradFull5”.
Duplicate ID “gradFull4”.
Duplicate ID “gradFull3”.
Duplicate ID “gradFull2”.
Duplicate ID “gradFull1”.
Duplicate ID “gradEmpty5”.
Duplicate ID “gradEmpty4”.
Duplicate ID “gradEmpty3”.
Duplicate ID “gradEmpty2”.
Duplicate ID “gradEmpty1”.
Element “a” not allowed as child of element “ul” in this context. (Suppressing further errors from this subtree.)
No “li” element in scope but a “li” end tag seen.
Element “div” not allowed as child of element “button” in this context. (Suppressing further errors from this subtree.)