Voipo.com W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Legacy doctype. Expected “<!DOCTYPE html>”.
Bad value “https://www.w3.org/1999/xhtml” for the attribute “xmlns” (only “http://www.w3.org/1999/xhtml” permitted here).
The “profile” attribute on the “head” element is obsolete. To declare which “meta” terms are used in the document, instead register the names as meta extensions. To trigger specific UA behaviors, use a “link” element instead.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Duplicate ID “a1”.
Duplicate ID “a2”.
Duplicate ID “a3”.
Warnings:
Attribute “xmlns” is not serializable as XML 1.0.
The “language” attribute on the “script” element is obsolete. You can safely omit it.
The first occurrence of ID “a1” was here.
The first occurrence of ID “a2” was here.
The first occurrence of ID “a3” was here.
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