Smart911.com W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
A “meta” element with an “http-equiv” attribute whose value is “X-UA-Compatible” must have a “content” attribute with the value “IE=edge”.
Bad value “javascript: void()” for attribute “href” on element “a”: syntax error
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Bad value “” for attribute “src” on element “img”: Must be non-empty.
Bad value “navigation” for attribute “role” on element “ul”.
Element “li” is missing one or more of the following attributes: “aria-checked”, “role”.
End tag had attributes.
The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.
Bad value “presentation” for attribute “role” on element “section”.
A numeric character reference expanded to the C1 controls range.
Warnings:
Consider avoiding viewport values that prevent users from resizing documents.
The “language” attribute on the “script” element is obsolete. You can safely omit it.
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