Errors:
Bad value “toolbar” for attribute “role” on element “nav”.
Bad value “banner” for attribute “role” on element “h1”.
Bad value “banner” for attribute “role” on element “figure”.
Duplicate ID “section”.
Duplicate ID “type”.
Duplicate ID “content_header”.
The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.
The element “h4” must not appear as a descendant of the “address” element.
The element “h3” must not appear as a descendant of the “address” element.
Warnings:
Empty heading.
The “navigation” role is unnecessary for element “nav”.
The “main” role is unnecessary for element “main”.
The “complementary” role is unnecessary for element “aside”.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
Article lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all articles.
The first occurrence of ID “section” was here.
The first occurrence of ID “type” was here.
The first occurrence of ID “content_header” was here.
The “list” role is unnecessary for element “ul”.
The “listitem” role is unnecessary for element “li”.
The “contentinfo” role is unnecessary for element “footer”.
This document appears to be written in Thai. Consider adding “lang="th"” (or variant) to the “html” start tag.
Thailand TH