Open.fm W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
A “meta” element with an “http-equiv” attribute whose value is “X-UA-Compatible” must have a “content” attribute with the value “IE=edge”.
Attribute “width” not allowed on element “div” at this point.
Attribute “height” not allowed on element “div” at this point.
Element “input” with attribute “type” whose value is “button” must have non-empty attribute “value”.
Warnings:
Consider avoiding viewport values that prevent users from resizing documents.
The “type” attribute is unnecessary for JavaScript resources.
The “language” attribute on the “script” element is obsolete. You can safely omit it.
The “charset” attribute on the “script” element is obsolete.
Empty heading.
Consider adding a “lang” attribute to the “html” start tag to declare the language of this document.
Poland PL