Errors:
Bad value “https://www.w3.org/1999/xhtml” for the attribute “xmlns” (only “http://www.w3.org/1999/xhtml” permitted here).
A “meta” element with an “http-equiv” attribute whose value is “X-UA-Compatible” must have a “content” attribute with the value “IE=edge”.
A document must not include both a “meta” element with an “http-equiv” attribute whose value is “content-type”, and a “meta” element with a “charset” attribute.
Bad value “fr_BE” for attribute “hreflang” on element “link”: The language subtag “fr_be” is not a valid language subtag.
Bad value “en_BE” for attribute “hreflang” on element “link”: The language subtag “en_be” is not a valid language subtag.
Bad value “https://api.w.org/” for attribute “rel” on element “link”: The string “https://api.w.org/” is not a registered keyword.
Duplicate ID “mercury”.
Duplicate ID “s”.
Duplicate ID “searchsubmit”.
Bad value “none” for attribute “border” on element “img”: Only “0” is a permitted zero literal.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Element “style” not allowed as child of element “div” in this context. (Suppressing further errors from this subtree.)
Stray end tag “ul”.
No “p” element in scope but a “p” end tag seen.
End tag “a” violates nesting rules.
Cannot recover after last error. Any further errors will be ignored.
Warnings:
Attribute “xmlns” is not serializable as XML 1.0.
Consider avoiding viewport values that prevent users from resizing documents.
The “language” attribute on the “script” element is obsolete. You can safely omit it.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
The first occurrence of ID “mercury” was here.
The first occurrence of ID “s” was here.
The first occurrence of ID “searchsubmit” was here.
The “border” attribute is obsolete. Consider specifying “img { border: 0; }” in CSS instead.
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