Beckhoff.com W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Start tag seen without seeing a doctype first. Expected “<!DOCTYPE html>”.
A “meta” element with an “http-equiv” attribute whose value is “X-UA-Compatible” must have a “content” attribute with the value “IE=edge”.
Bad value “expires” for attribute “http-equiv” on element “meta”.
Malformed byte sequence: “84”.
Attribute “frameborder” not allowed on element “frameset” at this point.
Attribute “framespacing” not allowed on element “frameset” at this point.
Attribute “border” not allowed on element “frameset” at this point.
The “frameset” element is obsolete. Use the “iframe” element and CSS instead, or use server-side includes.
Attribute “cols” not allowed on element “frameset” at this point.
The “noframes” element is obsolete. Use the “iframe” element and CSS instead, or use server-side includes.
Warnings:
The “language” attribute on the “script” element is obsolete. You can safely omit it.
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