Warnings:
The “type” attribute for the “style” element is not needed and should be omitted.
The “banner” role is unnecessary for element “header”.
Document uses the Unicode Private Use Area(s), which should not be used in publicly exchanged documents. (Charmod C073)
The first occurrence of ID “course-menu-wide” was here.
The first occurrence of ID “signupbar” was here.
Empty heading.
Attribute “&” is not serializable as XML 1.0.
Attribute “show:” is not serializable as XML 1.0.
Attribute “—” is not serializable as XML 1.0.
The “contentinfo” role is unnecessary for element “footer”.
Errors:
Duplicate ID “course-menu-wide”.
Bad value “” for attribute “tabindex” on element “input”: The empty string is not a valid integer.
Bad value “” for attribute “tabindex” on element “button”: The empty string is not a valid integer.
Duplicate ID “signupbar”.
Attribute “talk” not allowed on element “img” at this point.
Attribute “show” not allowed on element “img” at this point.
Attribute “with” not allowed on element “img” at this point.
Attribute “photographer” not allowed on element “img” at this point.
Attribute “&” not allowed on element “img” at this point.
Attribute “digital” not allowed on element “img” at this point.
Attribute “artist” not allowed on element “img” at this point.
Attribute “erik” not allowed on element “img” at this point.
Attribute “johansson” not allowed on element “img” at this point.
Attribute “live” not allowed on element “img” at this point.
Attribute “show:” not allowed on element “img” at this point.
Attribute “the” not allowed on element “img” at this point.
Attribute “magazine” not allowed on element “img” at this point.
Attribute “chat” not allowed on element “img” at this point.
Attribute “workshop” not allowed on element “img” at this point.
Attribute “—” not allowed on element “img” at this point.
Attribute “umbrella” not allowed on element “img” at this point.
Attribute “lighting” not allowed on element “img” at this point.
Named character reference was not terminated by a semicolon. (Or “&” should have been escaped as “&”.)
Element “style” not allowed as child of element “div” in this context. (Suppressing further errors from this subtree.)
Attribute “webkitallowfullscreen” not allowed on element “iframe” at this point.
Attribute “mozallowfullscreen” not allowed on element “iframe” at this point.
The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.
The value of the “for” attribute of the “label” element must be the ID of a non-hidden form control.
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