Natural-sciences.ru W3C HTML Markup Validation
HTML markup errors and warnings
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Warnings:
The “type” attribute is unnecessary for JavaScript resources.
The “navigation” role is unnecessary for element “nav”.
The first occurrence of ID “navbar-collapse-1” was here.
Errors:
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Element “div” not allowed as child of element “h1” in this context. (Suppressing further errors from this subtree.)
Duplicate ID “navbar-collapse-1”.
Bad value “submit” for attribute “type” on element “a”: Subtype missing.
Element “div” not allowed as child of element “h2” in this context. (Suppressing further errors from this subtree.)
Element “div” not allowed as child of element “small” in this context. (Suppressing further errors from this subtree.)
No “p” element in scope but a “p” end tag seen.
The “width” attribute on the “th” element is obsolete. Use CSS instead.
The “valign” attribute on the “td” element is obsolete. Use CSS instead.
The “height” attribute on the “td” element is obsolete. Use CSS instead.
The “width” attribute on the “td” element is obsolete. Use CSS instead.
Stray end tag “a”.
Element “div” not allowed as child of element “h3” in this context. (Suppressing further errors from this subtree.)
Bad value “mailto: support@rae.ru” for attribute “href” on element “a”: Illegal character in scheme data: space is not allowed.
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