Errors:
Bad value “top” for attribute “rel” on element “link”: The string “top” is not a registered keyword.
Bad value “screen,tv” for attribute “media” on element “link”: Deprecated media type “tv”. For guidance, see the Media Types section in the current Media Queries specification.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
The “scrolling” attribute on the “iframe” element is obsolete.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The “marginwidth” attribute on the “iframe” element is obsolete.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The “marginheight” attribute on the “iframe” element is obsolete.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The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.
Start tag “a” seen but an element of the same type was already open.
No space between attributes.
Attribute “ data-via” not allowed on element “a” at this point.
Duplicate ID “headbtns”.
The “allowtransparency” attribute on the “iframe” element is obsolete. Use CSS instead.
The “font” element is obsolete. Use CSS instead.
Warnings:
The “border” attribute is obsolete. Consider specifying “img { border: 0; }” in CSS instead.
Attribute “ data-via” is not serializable as XML 1.0.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
Article lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all articles.
The first occurrence of ID “headbtns” was here.
The “name” attribute is obsolete. Consider putting an “id” attribute on the nearest container instead.
This document appears to be written in Japanese. Consider adding “lang="ja"” (or variant) to the “html” start tag.
Japan JP