Warnings:
Consider avoiding viewport values that prevent users from resizing documents.
Article lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all articles.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
Empty heading.
The “language” attribute on the “script” element is obsolete. You can safely omit it.
This document appears to be written in English. Consider adding “lang="en"” (or variant) to the “html” start tag.
Errors:
Bad value “cz-CZ” for attribute “hreflang” on element “link”: The language subtag “cz” is not a valid ISO language part of a language tag.
Bad value “us-US” for attribute “hreflang” on element “link”: The language subtag “us” is not a valid ISO language part of a language tag.
Bad value “cz-SK” for attribute “hreflang” on element “link”: The language subtag “cz” is not a valid ISO language part of a language tag.
Bad value “gr-GR” for attribute “hreflang” on element “link”: The language subtag “gr” is not a valid ISO language part of a language tag.
Stray end tag “a”.
Element “div” not allowed as child of element “ul” in this context. (Suppressing further errors from this subtree.)
End tag “section” seen, but there were open elements.
Unclosed element “div”.
The “center” element is obsolete.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.
Bad value “https://felderid.felder-gruppe.at/js/cookie.js.php?lang=ENG&text=[8,web_Formulare_105,2,0]&tstamp=1512722752” for attribute “src” on element “script”: Illegal character in query: “[” is not allowed.
The “itemprop” attribute was specified, but the element is not a property of any item.
Russian Federation RU