Errors:
Attribute “xmlns:og” not allowed here.
Attribute “xmlns:fb” not allowed here.
Attribute “charsetre” not allowed on element “meta” at this point.
Element “meta” is missing one or more of the following attributes: “charset”, “content”, “http-equiv”, “itemprop”, “name”, “property”.
Duplicate ID “login-cnt”.
Attribute “xmlns:background” not allowed here.
Element “div” not allowed as child of element “h2” in this context. (Suppressing further errors from this subtree.)
Bad value “Google Ads (AdWords) Seminar für Einsteiger” for attribute “id” on element “a”: An ID must not contain whitespace.
Bad value “Webanalyse mit Analytics und dem Tag Manager” for attribute “id” on element “a”: An ID must not contain whitespace.
Bad value “Spezial-Seminar “Konversions-Optimierung”” for attribute “id” on element “a”: An ID must not contain whitespace.
Attribute “name” not allowed on element “meta” at this point.
Warnings:
Attribute with the local name “xmlns:og” is not serializable as XML 1.0.
Attribute with the local name “xmlns:fb” is not serializable as XML 1.0.
The “type” attribute is unnecessary for JavaScript resources.
The “type” attribute for the “style” element is not needed and should be omitted.
The “banner” role is unnecessary for element “header”.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
The first occurrence of ID “login-cnt” was here.
Attribute with the local name “xmlns:background” is not serializable as XML 1.0.
The “contentinfo” role is unnecessary for element “footer”.
Attribute “href” without an explicit value seen. The attribute may be dropped by IE7.
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