Ist.ac.at W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Saw “<?”. Probable cause: Attempt to use an XML processing instruction in HTML. (XML processing instructions are not supported in HTML.)
Almost standards mode doctype. Expected “<!DOCTYPE html>”.
Element “script” must not have attribute “defer” unless attribute “src” is also specified.
Bad value “Content-Style-Type” for attribute “http-equiv” on element “meta”.
Duplicate ID “nav_meta”.
Bad value “navigation” for attribute “role” on element “ul”.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
“"” in an unquoted attribute value. Probable causes: Attributes running together or a URL query string in an unquoted attribute value.
Bad value “”search"” for attribute “role” on element “form”.
Bad value “_target” for attribute “target” on element “a”: Reserved keyword “target” used.
Duplicate ID “frontpage-teaser-more-link”.
Warnings:
The first occurrence of ID “nav_meta” was here.
The “border” attribute is obsolete. Consider specifying “img { border: 0; }” in CSS instead.
The “name” attribute is obsolete. Consider putting an “id” attribute on the nearest container instead.
The first occurrence of ID “frontpage-teaser-more-link” was here.
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