Errors:
Bad value “https://api.w.org/” for attribute “rel” on element “link”: The string “https://api.w.org/” is not a registered keyword.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
End tag “div” seen, but there were open elements.
Unclosed element “a”.
No “a” element in scope but a “a” end tag seen.
Stray end tag “div”.
Duplicate ID “nav-custom-fix”.
Duplicate ID “menu-menu_main”.
Bad value “” for attribute “src” on element “img”: Must be non-empty.
Attribute “href” not allowed on element “h1” at this point.
Attribute “href” not allowed on element “h2” at this point.
The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.
Duplicate ID “sp-hot-3”.
Duplicate ID “box-2049”.
Duplicate ID “box-1972”.
Duplicate ID “box-1977”.
Duplicate ID “box-1978”.
End tag “br”.
Stray start tag “script”.
Bad value “javascript” for attribute “lang” on element “script”: Subtags must not exceed 8 characters in length.
The “for” attribute of the “label” element must refer to a non-hidden form control.
Warnings:
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
The first occurrence of ID “nav-custom-fix” was here.
The first occurrence of ID “menu-menu_main” was here.
The first occurrence of ID “sp-hot-3” was here.
The first occurrence of ID “box-2049” was here.
The first occurrence of ID “box-1972” was here.
The first occurrence of ID “box-1977” was here.
The first occurrence of ID “box-1978” was here.
This document appears to be written in Vietnamese but the “html” start tag has “lang="en-US"”. Consider using “lang="vi"” (or variant) instead.
Viet Nam VN