Schoonenberg.nl W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
A “charset” attribute on a “meta” element found after the first 1024 bytes.
Bad value “cleartype” for attribute “http-equiv” on element “meta”.
A “link” element with a “sizes” attribute must have a “rel” attribute that contains the value “icon” or the value “apple-touch-icon”.
Bad value “//fonts.googleapis.com/css?family=Open+Sans+Condensed:700|Open+Sans:400,300,600,700” for attribute “href” on element “link”: Illegal character in query: “|” is not allowed.
Duplicate attribute “class”.
Duplicate ID “niveau-3”.
Duplicate ID “niveau-2”.
Duplicate ID “niveau-1”.
Attribute “alt” not allowed on element “a” at this point.
The “allowtransparency” attribute on the “iframe” element is obsolete. Use CSS instead.
The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Duplicate ID “logo”.
Stray start tag “script”.
Warnings:
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
The first occurrence of ID “niveau-3” was here.
The first occurrence of ID “niveau-2” was here.
The first occurrence of ID “niveau-1” was here.
The first occurrence of ID “logo” was here.
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