Errors:
Almost standards mode doctype. Expected “<!DOCTYPE html>”.
The “cellspacing” attribute on the “table” element is obsolete. Use CSS instead.
The “cellpadding” attribute on the “table” element is obsolete. Use CSS instead.
The “border” attribute on the “table” element is obsolete. Use CSS instead.
Stray end tag “img”.
The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.
The “marginwidth” attribute on the “iframe” element is obsolete. Use CSS instead.
The “marginheight” attribute on the “iframe” element is obsolete. Use CSS instead.
The “scrolling” attribute on the “iframe” element is obsolete. Use CSS instead.
Saw “<!--” within a comment. Probable cause: Nested comment (not allowed).
The “width” attribute on the “table” element is obsolete. Use CSS instead.
The “align” attribute on the “table” element is obsolete. Use CSS instead.
Attribute “height” not allowed on element “tr” at this point.
The “bgcolor” attribute on the “tr” element is obsolete. Use CSS instead.
Attribute “background” not allowed on element “tr” at this point.
The “align” attribute on the “td” element is obsolete. Use CSS instead.
The “valign” attribute on the “td” element is obsolete. Use CSS instead.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Attribute “wide” not allowed on element “table” at this point.
Bad value “http://slide.ufm.edu.vn/2016/02/Danhbanoibo/danh ba noi bo.htm” for attribute “href” on element “a”: Illegal character in path segment: space is not allowed.
The “size” attribute on the “hr” element is obsolete. Use CSS instead.
The “color” attribute on the “hr” element is obsolete. Use CSS instead.
Stray start tag “html”.
Stray start tag “head”.
Attribute “name” not allowed on element “meta” at this point.
Element “meta” is missing one or more of the following attributes: “itemprop”, “property”.
Stray end tag “meta”.
Stray end tag “head”.
Start tag “body” seen but an element of the same type was already open.
Bad value “http://www.ufm.edu.vn/dulieu/2017/Lichtiepcongdan/Thong bao lich tiep dan cua HT.htm” for attribute “href” on element “a”: Illegal character in path segment: space is not allowed.
Stray end tag “body”.
Stray end tag “html”.
Row 1 of a row group established by a “tbody” element has no cells beginning on it.
Warnings:
The “language” attribute on the “script” element is obsolete. You can safely omit it.
The document is not mappable to XML 1.0 due to two consecutive hyphens in a comment.
A table row was 1 columns wide and exceeded the column count established by the first row (0).
This document appears to be written in Vietnamese. Consider adding “lang="vi"” (or variant) to the “html” start tag.
Viet Nam VN