Errors:
Bad value “” for attribute “id” on element “div”: An ID must not be the empty string.
End tag “p” implied, but there were open elements.
Unclosed element “span”.
Unclosed element “strong”.
End tag “h3” seen, but there were open elements.
Stray end tag “span”.
No “strong” element in scope but a “strong” end tag seen.
No “p” element in scope but a “p” end tag seen.
End tag “h4” seen, but there were open elements.
End tag “h5” seen, but there were open elements.
Stray start tag “span”.
Stray start tag “h3”.
Text not allowed in element “select” in this context.
Stray end tag “h3”.
Stray start tag “b”.
Stray end tag “b”.
Element “option” without attribute “label” must not be empty.
The “select” element cannot have more than one selected “option” descendant unless the “multiple” attribute is specified.
Stray end tag “div”.
Stray end tag “tr”.
Duplicate ID “all”.
Duplicate ID “jezyk-angielski”.
Duplicate ID “matematyka”.
Duplicate ID “jezyk-polski”.
Duplicate ID “jezyk-niemiecki”.
Duplicate ID “warszawa”.
Duplicate ID “krakow”.
Duplicate ID “wroclaw”.
Duplicate ID “lodz”.
Duplicate ID “gdansk”.
Duplicate ID “poznan”.
Duplicate ID “lublin”.
Duplicate ID “fizyka”.
Duplicate ID “chemia”.
Duplicate ID “historia-muzyki”.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Duplicate ID “foot_menus_box”.
Element “div” not allowed as child of element “button” in this context. (Suppressing further errors from this subtree.)
Duplicate ID “location”.
No space between attributes.
Attribute “page_id” not allowed on element “div” at this point.
Warnings:
The “name” attribute is obsolete. Consider putting an “id” attribute on the nearest container instead.
The first occurrence of ID “all” was here.
The first occurrence of ID “jezyk-angielski” was here.
The first occurrence of ID “matematyka” was here.
The first occurrence of ID “jezyk-polski” was here.
The first occurrence of ID “jezyk-niemiecki” was here.
The first occurrence of ID “warszawa” was here.
The first occurrence of ID “krakow” was here.
The first occurrence of ID “wroclaw” was here.
The first occurrence of ID “lodz” was here.
The first occurrence of ID “gdansk” was here.
The first occurrence of ID “poznan” was here.
The first occurrence of ID “lublin” was here.
The first occurrence of ID “fizyka” was here.
The first occurrence of ID “chemia” was here.
The first occurrence of ID “historia-muzyki” was here.
The document is not mappable to XML 1.0 due to two consecutive hyphens in a comment.
The first occurrence of ID “foot_menus_box” was here.
The first occurrence of ID “location” was here.
This document appears to be written in Polish. Consider adding “lang="pl"” (or variant) to the “html” start tag.
Poland PL