Luce-gas.it W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
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.
Saw “<?”. Probable cause: Attempt to use an XML processing instruction in HTML. (XML processing instructions are not supported in HTML.)
Stray doctype.
Duplicate ID “black_stripe”.
Duplicate ID “red_stripe”.
Duplicate ID “gold_stripe”.
Stray end tag “strong”.
Duplicate ID “number_link”.
Duplicate ID “fb-root”.
Warnings:
The first occurrence of ID “black_stripe” was here.
The first occurrence of ID “red_stripe” was here.
The first occurrence of ID “gold_stripe” was here.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
The first occurrence of ID “number_link” was here.
The first occurrence of ID “fb-root” was here.
This document appears to be written in Italian but the “html” start tag has “lang="fr-fr"”. Consider using “lang="it"” (or variant) instead.
Italy IT