Errors:
Bad value “https://api.w.org/” for attribute “rel” on element “link”: The string “https://api.w.org/” is not a registered keyword.
Bad value “https://theeventscalendar.com” for attribute “rel” on element “link”: The string “https://theeventscalendar.com” is not a registered keyword.
A “meta” element with an “http-equiv” attribute whose value is “X-UA-Compatible” must have a “content” attribute with the value “IE=edge”.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Bad value “dofollow” for attribute “rel” on element “a”: The string “dofollow” is not a registered keyword.
Duplicate ID “rss”.
Element “region” not allowed as child of element “div” in this context. (Suppressing further errors from this subtree.)
No space between attributes.
Quote “"” in attribute name. Probable cause: Matching quote missing somewhere earlier.
Element “region” not allowed as child of element “ul” in this context. (Suppressing further errors from this subtree.)
Duplicate ID “Tab1”.
Duplicate ID “Tab2”.
Duplicate ID “Tab3”.
Duplicate ID “Tab1_cont”.
Duplicate ID “Tab2_cont”.
Duplicate ID “Tab3_cont”.
Duplicate ID “ajaxCont3”.
The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.
Duplicate ID “ajaxCont8”.
Duplicate ID “ajaxCont9”.
Duplicate ID “ajaxCont10”.
Duplicate ID “ajaxCont11”.
Duplicate attribute “class”.
Duplicate attribute “title”.
Element “style” not allowed as child of element “body” in this context. (Suppressing further errors from this subtree.)
Warnings:
Consider avoiding viewport values that prevent users from resizing documents.
The “border” attribute is obsolete. Consider specifying “img { border: 0; }” in CSS instead.
The first occurrence of ID “rss” was here.
Empty heading.
Attribute “spotkania",” is not serializable as XML 1.0.
Attribute “animatorów,” is not serializable as XML 1.0.
Attribute “powołania,” is not serializable as XML 1.0.
Attribute “"oto” is not serializable as XML 1.0.
Attribute “twoja""” is not serializable as XML 1.0.
The first occurrence of ID “Tab1” was here.
The first occurrence of ID “Tab2” was here.
The first occurrence of ID “Tab3” was here.
The first occurrence of ID “Tab1_cont” was here.
The first occurrence of ID “Tab2_cont” was here.
The first occurrence of ID “Tab3_cont” was here.
The first occurrence of ID “ajaxCont3” was here.
The first occurrence of ID “ajaxCont8” was here.
The first occurrence of ID “ajaxCont9” was here.
The first occurrence of ID “ajaxCont10” was here.
The first occurrence of ID “ajaxCont11” was here.
This document appears to be written in Polish. Consider adding “lang="pl"” (or variant) to the “html” start tag.
Consider using the “h1” element as a top-level heading only (all “h1” elements are treated as top-level headings by many screen readers and other tools).
Poland PL