Spnttw.edu.vn W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Almost standards mode doctype. Expected “<!DOCTYPE html>”.
A “meta” element with an “http-equiv” attribute whose value is “X-UA-Compatible” must have a “content” attribute with the value “IE=edge”.
Element “title” not allowed as child of element “head” in this context. (Suppressing further errors from this subtree.)
Element “title” must not be empty.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Attribute “has-child” not allowed on element “li” at this point.
Attribute “showtip” not allowed on element “img” at this point.
Attribute “se” not allowed on element “ul” at this point.
Attribute “href” not allowed on element “span” at this point.
Attribute “showtip” not allowed on element “span” at this point.
Attribute “se” not allowed on element “a” at this point.
Warnings:
The “type” attribute is unnecessary for JavaScript resources.
Text run is not in Unicode Normalization Form C.
Consider adding a “lang” attribute to the “html” start tag to declare the language of this document.
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