Locowise.com W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Attribute “webkitallowfullscreen” not allowed on element “iframe” at this point.
Attribute “mozallowfullscreen” not allowed on element “iframe” at this point.
The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.
Duplicate ID “cta_trial_home”.
Bad value “” for attribute “action” on element “form”: Must be non-empty.
The “aria-labelledby” attribute must point to an element in the same document.
Warnings:
The first occurrence of ID “cta_trial_home” was here.
Consider using the “h1” element as a top-level heading only (all “h1” elements are treated as top-level headings by many screen readers and other tools).
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