Errors:
Almost standards mode doctype. Expected “<!DOCTYPE html>”.
Bad value “https://www.w3.org/1999/xhtml” for the attribute “xmlns” (only “http://www.w3.org/1999/xhtml” permitted here).
When the attribute “xml:lang” in no namespace is specified, the element must also have the attribute “lang” present with the same value.
Bad start tag in “img” in “head”.
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 “noscript”.
Stray end tag “head”.
Start tag “body” seen but an element of the same type was already open.
Duplicate ID “checked”.
Duplicate ID “header2”.
Duplicate ID “header-in”.
Duplicate ID “main-area”.
The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.
Bad value “90%” for attribute “width” on element “iframe”: Expected a digit but saw “%” instead.
The “name” attribute on the “img” element is obsolete. Use the “id” attribute instead.
Element “style” not allowed as child of element “div” in this context. (Suppressing further errors from this subtree.)
Bad value “” for attribute “src” on element “audio”: Must be non-empty.
Bad value “100%” for attribute “width” on element “iframe”: Expected a digit but saw “%” instead.
The “scrolling” attribute on the “iframe” element is obsolete. Use CSS instead.
Duplicate ID “Column”.
Bad value “90%” for attribute “width” on element “img”: Expected a digit but saw “%” instead.
Element “style” not allowed as child of element “body” in this context. (Suppressing further errors from this subtree.)
A “link” element must not appear as a descendant of a “body” element unless the “link” element has an “itemprop” attribute or has a “rel” attribute whose value contains “dns-prefetch”, “pingback”, “preconnect”, “prefetch”, “preload”, “prerender”, or “stylesheet”.
Attribute “name” not allowed on element “meta” at this point.
Element “meta” is missing one or more of the following attributes: “itemprop”, “property”.
Warnings:
Attribute “xmlns” is not serializable as XML 1.0.
The first occurrence of ID “checked” was here.
The first occurrence of ID “header2” was here.
The first occurrence of ID “header-in” was here.
The first occurrence of ID “main-area” was here.
The “language” attribute on the “script” element is obsolete. You can safely omit it.
Empty heading.
The first occurrence of ID “Column” was here.
This document appears to be written in Japanese. Consider adding “lang="ja"” (or variant) to the “html” start tag.
Japan JP