Errors:
A “charset” attribute on a “meta” element found after the first 1024 bytes.
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.
A “meta” element with an “http-equiv” attribute whose value is “X-UA-Compatible” must have a “content” attribute with the value “IE=edge”.
Element “meta” is missing one or more of the following attributes: “charset”, “content”, “http-equiv”, “itemprop”, “name”, “property”.
Element “div” not allowed as child of element “h3” in this context. (Suppressing further errors from this subtree.)
Bad value “button” for attribute “type” on element “a”: Subtype missing.
Duplicate ID “display_menu_1”.
The “width” attribute on the “table” element is obsolete. Use CSS instead.
The “cellspacing” attribute on the “table” element is obsolete. Use CSS instead.
The “cellpadding” attribute on the “table” element is obsolete. Use CSS instead.
The “align” attribute on the “table” element is obsolete. Use CSS instead.
The “border” attribute on the “table” element is obsolete. Use CSS instead.
The “width” attribute on the “td” element is obsolete. Use CSS instead.
The “valign” attribute on the “td” element is obsolete. Use CSS instead.
Element “img” is missing required attribute “src”.
Bad value “true” for attribute “readonly” on element “textarea”.
Warnings:
Consider avoiding viewport values that prevent users from resizing documents.
The first occurrence of ID “display_menu_1” was here.
The “main” role is unnecessary for element “main”.
The “language” attribute on the “script” element is obsolete. You can safely omit it.
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