Technique.co.jp W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Almost standards mode doctype. Expected “<!DOCTYPE html>”.
Bad value “Pragma” for attribute “http-equiv” on element “meta”.
Bad value “Cache-Control” for attribute “http-equiv” on element “meta”.
Bad value “Expires” for attribute “http-equiv” on element “meta”.
Bad value “Last-Modified” for attribute “http-equiv” on element “meta”.
The “align” attribute on the “div” element is obsolete.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 “rel” not allowed on element “form” at this point.
Attribute “border” not allowed on element “input” at this point.
Duplicate ID “_csrf_token”.
The “name” attribute on the “img” element is obsolete. Use the “id” attribute instead.
The “hspace” attribute on the “img” element is obsolete. Use CSS instead.
Warnings:
The “border” attribute is obsolete. Consider specifying “img { border: 0; }” in CSS instead.
The first occurrence of ID “_csrf_token” was here.
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