Nina.vn W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Almost standards mode doctype. Expected “<!DOCTYPE html>”.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Duplicate ID “icon4”.
Duplicate ID “dv1”.
Duplicate ID “noidung”.
Duplicate ID “row”.
The “center” element is obsolete. Use CSS instead.
Element “style” not allowed as child of element “center” in this context. (Suppressing further errors from this subtree.)
Duplicate ID “tin1”.
Duplicate ID “tt”.
Element “style” not allowed as child of element “div” in this context. (Suppressing further errors from this subtree.)
The “itemprop” attribute was specified, but the element is not a property of any item.
Warnings:
The “border” attribute is obsolete. Consider specifying “img { border: 0; }” in CSS instead.
The first occurrence of ID “icon4” was here.
The first occurrence of ID “dv1” was here.
The first occurrence of ID “noidung” was here.
The first occurrence of ID “row” was here.
The first occurrence of ID “tin1” was here.
The first occurrence of ID “tt” was here.
This document appears to be written in Vietnamese. Consider adding “lang="vi"” (or variant) to the “html” start tag.
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