Waxmann.com W3C HTML Markup Validation
HTML markup errors and warnings
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Warnings:
The “border” attribute is obsolete. Consider specifying “img { border: 0; }” in CSS instead.
The first occurrence of ID “c452” was here.
The first occurrence of ID “c454” was here.
This document appears to be written in German. Consider adding “lang="de"” (or variant) to the “html” start tag.
Errors:
Bad value “https://www.waxmann.com/index.php?id=30&tx_felogin_pi1[forgot]=1” for attribute “href” on element “a”: Illegal character in query: “[” is not allowed.
Bad value “” for attribute “name” on element “button”: Must not be empty.
Bad value “https://www.waxmann.com/waxmann-buecher/?tx_p2waxmann_pi2[buchnr]=3841&tx_p2waxmann_pi2[action]=show” for attribute “href” on element “a”: Illegal character in query: “[” is not allowed.
Duplicate ID “c452”.
Duplicate ID “c454”.
The “for” attribute of the “label” element must refer to a non-hidden form control.
The “aria-labelledby” attribute must point to an element in the same document.
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