Errors:
Almost standards mode doctype. Expected “<!DOCTYPE html>”.
When the attribute “xml:lang” in no namespace is specified, the element must also have the attribute “lang” present with the same value.
Bad value “screen, projection” for attribute “media” on element “link”: Deprecated media type “projection”. For guidance, see the Media Types section in the current Media Queries specification.
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 “” for attribute “src” on element “iframe”: Must be non-empty.
The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.
The “marginwidth” attribute on the “iframe” element is obsolete. Use CSS instead.
The “marginheight” attribute on the “iframe” element is obsolete. Use CSS instead.
The “scrolling” attribute on the “iframe” element is obsolete. Use CSS instead.
Bad value “https://ad.doubleclick.net/ddm/trackimp/N137008.2117900ORIGOHU/B20492782.209280968;dc_trk_aid=409132570;dc_trk_cid=95228131;ord=[timestamp];dc_lat=;dc_rdid=;tag_for_child_directed_treatment=?” for attribute “src” on element “img”: Illegal character in path segment: “[” is not allowed.
End tag “div” seen, but there were open elements.
Unclosed element “ul”.
The “clear” attribute on the “br” element is obsolete.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.
Warnings:
The “border” attribute is obsolete. Consider specifying “img { border: 0; }” in CSS instead.
This document appears to be written in Hungarian. Consider adding “lang="hu"” (or variant) to the “html” start tag.
Hungary HU