Errors:
Bad value “author” for attribute “http-equiv” on element “meta”.
A “meta” element with an “http-equiv” attribute whose value is “X-UA-Compatible” must have a “content” attribute with the value “IE=edge”.
Bad value “submit” for attribute “type” on element “a”: Subtype missing.
Stray end tag “pre”.
Bad value “9” for attribute “rel” on element “ul”: The string “9” is not an absolute URL.
Duplicate ID “Ebene_1”.
Duplicate ID “Ebene_2”.
Bad value “3” for attribute “rel” on element “ul”: The string “3” is not an absolute URL.
Bad value “7” for attribute “rel” on element “ul”: The string “7” is not an absolute URL.
End tag “li” seen, but there were open elements.
Unclosed element “div”.
Element “div” not allowed as child of element “ul” in this context. (Suppressing further errors from this subtree.)
Bad value “” for attribute “target” on element “a”: Browsing context name must be at least one character long.
Stray start tag “html”.
Stray start tag “head”.
A “charset” attribute on a “meta” element found after the first 1024 bytes.
Attribute “charset” not allowed on element “meta” at this point.
Element “meta” is missing one or more of the following attributes: “content”, “itemprop”, “property”.
A document must not include both a “meta” element with an “http-equiv” attribute whose value is “content-type”, and a “meta” element with a “charset” attribute.
Element “title” not allowed as child of element “div” in this context. (Suppressing further errors from this subtree.)
Stray end tag “head”.
Start tag “body” seen but an element of the same type was already open.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
End tag for “body” seen, but there were unclosed elements.
Stray start tag “footer”.
Cannot recover after last error. Any further errors will be ignored.
Warnings:
Consider avoiding viewport values that prevent users from resizing documents.
The “type” attribute is unnecessary for JavaScript resources.
The “banner” role is unnecessary for element “header”.
The “navigation” role is unnecessary for element “nav”.
The first occurrence of ID “Ebene_1” was here.
The first occurrence of ID “Ebene_2” was here.
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