Zostel.com W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Bad value “http://www.w3.org/1999/html” for the attribute “xmlns” (only “http://www.w3.org/1999/xhtml” permitted here).
Bad value “x-dns-prefetch-control” for attribute “http-equiv” on element “meta”.
Bad value “true” for attribute “readonly” on element “input”.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
The element “button” must not appear as a descendant of the “a” element.
Attribute “alt” not allowed on element “span” at this point.
Attribute “\” not allowed on element “input” at this point.
Duplicate ID “city-select”.
Duplicate ID “check-in”.
Duplicate ID “check-out”.
Warnings:
Attribute “xmlns” is not serializable as XML 1.0.
Consider avoiding viewport values that prevent users from resizing documents.
Attribute “\” is not serializable as XML 1.0.
The first occurrence of ID “city-select” was here.
The first occurrence of ID “check-in” was here.
The first occurrence of ID “check-out” was here.
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