Errors:
Missing space before doctype name.
Nameless doctype.
Quirky doctype. Expected “<!DOCTYPE html>”.
Bad value “Cache-Control” for attribute “http-equiv” on element “meta”.
Bad value “Pragma” for attribute “http-equiv” on element “meta”.
Bad value “Expires” for attribute “http-equiv” on element “meta”.
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.
Bad value “button” for attribute “type” on element “a”: Subtype missing.
Stray end tag “span”.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Duplicate ID “blueartbt”.
No space between attributes.
Quote “"” in attribute name. Probable cause: Matching quote missing somewhere earlier.
Attribute “100%"” not allowed on element “div” at this point.
Duplicate ID “whiteart”.
Duplicate ID “blueart”.
Warnings:
The “banner” role is unnecessary for element “header”.
Consider using the “h1” element as a top-level heading only (all “h1” elements are treated as top-level headings by many screen readers and other tools).
The first occurrence of ID “blueartbt” was here.
Attribute “100%"” is not serializable as XML 1.0.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
The first occurrence of ID “whiteart” was here.
The first occurrence of ID “blueart” was here.
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