Planetizen.com W3C HTML Markup Validation
HTML markup errors and warnings
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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.
Element “div” is missing one or more of the following attributes: “role”.
Duplicate ID “block-apachesolr-panels-search-form”.
Duplicate ID “apachesolr-panels-search-block”.
Duplicate ID “edit-apachesolr-panels-search-form”.
Duplicate ID “edit-actions”.
Duplicate ID “edit-submit--2”.
Bad value “https://courses.planetizen.com/courses?f[0]=im_field_credit%3A141” for attribute “href” on element “a”: Illegal character in query: “[” is not allowed.
Bad value “1” for attribute “required” on element “input”.
Warnings:
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
The first occurrence of ID “block-apachesolr-panels-search-form” was here.
The first occurrence of ID “apachesolr-panels-search-block” was here.
The first occurrence of ID “edit-apachesolr-panels-search-form” was here.
The first occurrence of ID “edit-actions” was here.
The first occurrence of ID “edit-submit--2” was here.
The “navigation” role is unnecessary for element “nav”.
The “banner” role is unnecessary for element “header”.
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