Smartwings.com W3C HTML Markup Validation
HTML markup errors and warnings
(Rescan now...)
Warnings:
The “navigation” role is unnecessary for element “nav”.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
Article lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all articles.
The “form” role is unnecessary for element “form”.
The first occurrence of ID “wing” was here.
Errors:
Duplicate attribute “xmlns”.
Bad value “100%” for attribute “width” on element “iframe”: Expected a digit but saw “%” instead.
The “scrolling” attribute on the “iframe” element is obsolete. Use CSS instead.
The “marginheight” attribute on the “iframe” element is obsolete. Use CSS instead.
The “marginwidth” attribute on the “iframe” element is obsolete. Use CSS instead.
The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.
Text not allowed in element “iframe” in this context.
Attribute “seamless” not allowed on element “iframe” at this point.
Element “div” not allowed as child of element “bdo” in this context. (Suppressing further errors from this subtree.)
Duplicate ID “wing”.
Czech Republic CZ