Warnings:
Consider avoiding viewport values that prevent users from resizing documents.
The “language” attribute on the “script” element is obsolete. You can safely omit it.
The “border” attribute is obsolete. Consider specifying “img { border: 0; }” in CSS instead.
Attribute “0” is not serializable as XML 1.0.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
Consider using the “h1” element as a top-level heading only (all “h1” elements are treated as top-level headings by many screen readers and other tools).
The first occurrence of ID “sommaire” was here.
Article lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all articles.
Errors:
Bad start tag in “img” in “head”.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Stray end tag “noscript”.
Stray end tag “head”.
Start tag “body” seen but an element of the same type was already open.
Bad value “https://adserver.adtech.de/adlink/3.0/1502/5688140/0/16/ADTECH;loc=300;key=key1+key2+key3+key4;grp=[group]” for attribute “href” on element “a”: Illegal character in path segment: “[” is not allowed.
Bad value “https://adserver.adtech.de/adserv/3.0/1502/5688140/0/16/ADTECH;loc=300;key=key1+key2+key3+key4;grp=[group]” for attribute “src” on element “img”: Illegal character in path segment: “[” is not allowed.
Attribute “0” not allowed on element “table” at this point.
The “cellspacing” attribute on the “table” element is obsolete. Use CSS instead.
Bad value “{size: {x: 206, y: 333}, ajaxOptions: {method: "get"}}” for attribute “rel” on element “a”: The string “{size:” is not a registered keyword.
Element “meta” is missing required attribute “content”.
No “p” element in scope but a “p” end tag seen.
Duplicate ID “sommaire”.
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