Dongguk.ac.kr 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.
Stray end tag “b”.
No space between attributes.
Bad value “Document.body.clientWidth” for attribute “width” on element “object”: Expected a digit but saw “D” instead.
Bad value “Document.body.clientHeight” for attribute “height” on element “object”: Expected a digit but saw “D” instead.
Element “object” is missing one or more of the following attributes: “data”, “type”.
The “classid” attribute on the “object” element is obsolete. Use the “data” and “type” attributes to invoke plugins. To set a parameter with the name “classid”, use the “param” element.
The “codebase” attribute on the “object” element is obsolete. Use the “data” and “type” attributes to invoke plugins. To set a parameter with the name “codebase”, use the “param” element.
Attribute “size” not allowed on element “input” at this point.
Warnings:
The “language” attribute on the “script” element is obsolete. You can safely omit it.
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