Errors:
Almost standards mode doctype. Expected “<!DOCTYPE html>”.
Bad value “text/html; charset=UTF-8;” for attribute “content” on element “meta”: The legacy encoding contained “;”, which is not a valid character in an encoding name.
Bad value “Author” for attribute “http-equiv” on element “meta”.
Attribute “name” not allowed on element “meta” at this point.
Bad value “Reply-to” for attribute “http-equiv” on element “meta”.
Bad value “true” for attribute “async” on element “script”.
Element “ul” not allowed as child of element “span” in this context. (Suppressing further errors from this subtree.)
The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.
The “scrolling” attribute on the “iframe” element is obsolete. Use CSS instead.
Bad value “https://www.peterlanghout.nl/all-inclusive/zoek-en-boek/?transporttypen=Eigen%20vervoer&lengtes=3%20dagen&sort=price|asc” for attribute “href” on element “a”: Illegal character in query: “|” is not allowed.
Attribute “rel” not allowed on element “li” at this point.
Bad value “img0” for attribute “rel” on element “a”: The string “img0” is not a registered keyword.
Bad value “img1” for attribute “rel” on element “a”: The string “img1” is not a registered keyword.
Bad value “img2” for attribute “rel” on element “a”: The string “img2” is not a registered keyword.
Bad value “img3” for attribute “rel” on element “a”: The string “img3” is not a registered keyword.
Bad value “img4” for attribute “rel” on element “a”: The string “img4” is not a registered keyword.
Bad value “img5” for attribute “rel” on element “a”: The string “img5” is not a registered keyword.
Bad value “img6” for attribute “rel” on element “a”: The string “img6” is not a registered keyword.
Bad value “img7” for attribute “rel” on element “a”: The string “img7” is not a registered keyword.
Bad value “img8” for attribute “rel” on element “a”: The string “img8” is not a registered keyword.
Bad value “img9” for attribute “rel” on element “a”: The string “img9” is not a registered keyword.
Warnings:
The “border” attribute is obsolete. Consider specifying “img { border: 0; }” in CSS instead.
This document appears to be written in Dutch. Consider adding “lang="nl"” (or variant) to the “html” start tag.
Netherlands NL