Web116.jp W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Legacy encoding “shift_jis” used. Documents must use UTF-8.
Almost standards mode doctype. Expected “<!DOCTYPE html>”.
Bad value “text/html; charset=shift_jis” for attribute “content” on element “meta”: “charset=” must be followed by “utf-8”.
Bad value “Content-Style-Type” for attribute “http-equiv” on element “meta”.
Bad value “Content-Script-Type” for attribute “http-equiv” on element “meta”.
Element “dl” is missing a required child element.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Warnings:
The “type” attribute is unnecessary for JavaScript resources.
The “language” attribute on the “script” element is obsolete. You can safely omit it.
The “name” attribute is obsolete. Consider putting an “id” attribute on the nearest container instead.
The “charset” attribute on the “script” element is obsolete.
The “border” attribute is obsolete. Consider specifying “img { border: 0; }” in CSS instead.
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