Bangkokbiznews.com W3C HTML Markup Validation
HTML markup errors and warnings
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Warnings:
Consider avoiding viewport values that prevent users from resizing documents.
The “banner” role is unnecessary for element “header”.
The “navigation” role is unnecessary for element “nav”.
The first occurrence of ID “ads-A2” was here.
The document is not mappable to XML 1.0 due to two consecutive hyphens in a comment.
The first occurrence of ID “tab-1” was here.
Empty heading.
This document appears to be written in Thai but the “html” start tag has “lang="en"”. Consider using “lang="th"” (or variant) instead.
Errors:
Duplicate ID “ads-A2”.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Saw “<!--” within a comment. Probable cause: Nested comment (not allowed).
Bad value “_blankl” for attribute “target” on element “a”: Reserved keyword “blankl” used.
Duplicate ID “tab-1”.
Stray end tag “a”.
The “scrolling” attribute on the “iframe” element is obsolete. Use CSS instead.
The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.
Self-closing syntax (“/>”) used on a non-void HTML element. Ignoring the slash and treating as a start tag.
The “language” attribute on the “script” element is obsolete. Use the “type” attribute instead.
Element “style” not allowed as child of element “body” in this context. (Suppressing further errors from this subtree.)
Thailand TH