Errors:
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.
Bad value “https://5200309.fls.doubleclick.net/activityi;src=5200309;type=visit;cat=allsite;u1="http://www.losc.fr/";dc_lat=;dc_rdid=;tag_for_child_directed_treatment=;ord=1?” for attribute “src” on element “iframe”: Illegal character in path segment: “"” is not allowed.
The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.
Duplicate ID “losc-base-recherche-header-form”.
Duplicate ID “edit-losc-recherche-key”.
Duplicate ID “edit-submit-button”.
The element “button” must not appear as a descendant of the “a” element.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Element “p” not allowed as child of element “span” in this context. (Suppressing further errors from this subtree.)
Attribute “alt” not allowed on element “a” at this point.
Bad value “auto” for attribute “height” on element “img”: Expected a digit but saw “a” instead.
End tag for “body” seen, but there were unclosed elements.
Unclosed element “div”.
Warnings:
The first occurrence of ID “losc-base-recherche-header-form” was here.
The first occurrence of ID “edit-losc-recherche-key” was here.
The first occurrence of ID “edit-submit-button” was here.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
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