Errors:
Bad value “application/xhtml+xml; charset=utf-8” for attribute “content” on element “meta”: The legacy encoding declaration did not start with “text/html;”.
A document must not include both a “meta” element with an “http-equiv” attribute whose value is “content-type”, and a “meta” element with a “charset” attribute.
Stray end tag “link”.
Stray end tag “center”.
Stray end tag “input”.
Element “span” 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.
End tag “section” seen, but there were open elements.
Unclosed element “div”.
Bad value “100%” for attribute “width” on element “img”: Expected a digit but saw “%” instead.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
The “center” element is obsolete. Use CSS instead.
Element “style” not allowed as child of element “div” in this context. (Suppressing further errors from this subtree.)
End tag “a” violates nesting rules.
Bad value “//” for attribute “src” on element “script”: Invalid host: empty host.
Attribute “background” not allowed on element “object” at this point.
Discarding unrecognized token “active” from value of attribute “role”. Browsers ignore any token that is not a defined ARIA non-abstract role.
The “cellspacing” attribute on the “table” element is obsolete. Use CSS instead.
The “width” attribute on the “table” element is obsolete. Use CSS instead.
Bad value “” for attribute “src” on element “img”: Must be non-empty.
Duplicate ID “spolecznosci-2175”.
The “marginheight” attribute on the “iframe” element is obsolete. Use CSS instead.
The “marginwidth” attribute on the “iframe” element is obsolete. Use CSS instead.
The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.
Bad value “_blanc” for attribute “target” on element “a”: Reserved keyword “blanc” used.
Element “style” not allowed as child of element “center” in this context. (Suppressing further errors from this subtree.)
Stray end tag “div”.
Warnings:
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
The “language” attribute on the “script” element is obsolete. You can safely omit it.
The first occurrence of ID “spolecznosci-2175” was here.
This document appears to be written in Polish but the “html” start tag has “lang="en"”. Consider using “lang="pl"” (or variant) instead.
Poland PL