Mathcats.com W3C HTML Markup Validation
HTML markup errors and warnings
(Rescan now...)
Errors:
Start tag seen without seeing a doctype first. Expected “<!DOCTYPE html>”.
Element “head” is missing a required instance of child element “title”.
Stray start tag “html”.
Stray start tag “head”.
Attribute “name” not allowed on element “meta” at this point.
Element “meta” is missing one or more of the following attributes: “itemprop”, “property”.
Attribute “http-equiv” not allowed on element “meta” at this point.
Element “title” not allowed as child of element “body” in this context. (Suppressing further errors from this subtree.)
Stray end tag “head”.
Element “style” not allowed as child of element “body” in this context. (Suppressing further errors from this subtree.)
Start tag “body” seen but an element of the same type was already open.
Cannot recover after last error. Any further errors will be ignored.
Warnings:
The “language” attribute on the “script” element is obsolete. You can safely omit it.
United States US