Tbivision.com W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Duplicate attribute “xmlns”.
Duplicate attribute “prefix”.
When the attribute “xml:lang” in no namespace is specified, the element must also have the attribute “lang” present with the same value.
Bad value “https://api.w.org/” for attribute “rel” on element “link”: The string “https://api.w.org/” is not a registered keyword.
No space between attributes.
Quote “'” in attribute name. Probable cause: Matching quote missing somewhere earlier.
Bad value “https://servedby.informatm.com/ck.php?n=a04e9d85&cb=1511949702438 target=” for attribute “href” on element “a”: Illegal character in query: space is not allowed.
Attribute “_blank'” not allowed on element “a” at this point.
Bad value “https://servedby.informatm.com/ck.php?n=ac642def&cb=1511949740335 target=” for attribute “href” on element “a”: Illegal character in query: space is not allowed.
Bad value “https://servedby.informatm.com/ck.php?n=ad9ccfde&cb=1511976993506 target=” for attribute “href” on element “a”: Illegal character in query: space is not allowed.
Start tag “a” seen but an element of the same type was already open.
End tag “a” violates nesting rules.
Cannot recover after last error. Any further errors will be ignored.
Warnings:
Attribute “_blank'” is not serializable as XML 1.0.
The “border” attribute is obsolete. Consider specifying “img { border: 0; }” in CSS instead.
The “banner” role is unnecessary for element “header”.
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