Errors:
Obsolete doctype. Expected “<!DOCTYPE html>”.
Using the “meta” element to specify the document-wide default language is obsolete. Consider specifying the language on the root element instead.
The “charset” attribute on the “link” element is obsolete. Use an HTTP Content-Type header on the linked resource instead.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Element “div” not allowed as child of element “ul” in this context. (Suppressing further errors from this subtree.)
Bad value “25.5” for attribute “height” on element “img”: Expected a digit but saw “.” instead.
Bad value “” for attribute “action” on element “form”: Must be non-empty.
Bad value “172/” for attribute “width” on element “img”: Expected a digit but saw “/” instead.
Bad value “28.5” for attribute “height” on element “img”: Expected a digit but saw “.” instead.
Element “style” not allowed as child of element “div” in this context. (Suppressing further errors from this subtree.)
The “name” attribute on the “img” element is obsolete. Use the “id” attribute instead.
No space between attributes.
Warnings:
The “charset” attribute on the “script” element is obsolete.
The “type” attribute is unnecessary for JavaScript resources.
The “border” attribute is obsolete. Consider specifying “img { border: 0; }” in CSS instead.
This document appears to be written in German. Consider adding “lang="de"” (or variant) to the “html” start tag.
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