Cenowarka.pl W3C HTML Markup Validation
HTML markup errors and warnings
(Rescan now...)
Errors:
Saw “<!--” within a comment. Probable cause: Nested comment (not allowed).
Bad value “true” for attribute “async” on element “script”.
Bad value “P3P” for attribute “http-equiv” on element “meta”.
The “clear” attribute on the “br” element is obsolete.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.
The “align” attribute on the “div” element is obsolete. Use CSS instead.
Element “h3” not allowed as child of element “ul” in this context. (Suppressing further errors from this subtree.)
Warnings:
The document is not mappable to XML 1.0 due to two consecutive hyphens in a comment.
Empty heading.
The “border” attribute is obsolete. Consider specifying “img { border: 0; }” in CSS instead.
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