Errors:
Almost standards mode doctype. Expected “<!DOCTYPE html>”.
Bad value “Content-Script-Type” for attribute “http-equiv” on element “meta”.
Bad value “Content-Style-Type” for attribute “http-equiv” on element “meta”.
Duplicate ID “zuiyo”.
Duplicate ID “img10”.
Duplicate ID “body”.
Duplicate ID “course_sh”.
Duplicate ID “course_btn”.
Duplicate ID “course_jh”.
Duplicate ID “course_name”.
Duplicate ID “course_hs”.
The element “h3” must not appear as a descendant of the “dt” element.
The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.
The “scrolling” attribute on the “iframe” element is obsolete. Use CSS instead.
The “marginheight” attribute on the “iframe” element is obsolete. Use CSS instead.
The “marginwidth” attribute on the “iframe” element is obsolete. Use CSS instead.
The hash-name reference in attribute “usemap” referred to “Map”, but there is no “map” element with a “name” attribute with that value.
Warnings:
The “border” attribute is obsolete. Consider specifying “img { border: 0; }” in CSS instead.
The first occurrence of ID “zuiyo” was here.
The first occurrence of ID “img10” was here.
The first occurrence of ID “body” was here.
The first occurrence of ID “course_sh” was here.
The first occurrence of ID “course_btn” was here.
The first occurrence of ID “course_jh” was here.
The first occurrence of ID “course_name” was here.
The first occurrence of ID “course_hs” was here.
The “language” attribute on the “script” element is obsolete. You can safely omit it.
Japan JP