Errors:
Bad value “X-Frame-Options” for attribute “http-equiv” on element “meta”.
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 “action” on element “form”: Must be non-empty.
Bad value “” for attribute “method” on element “form”.
Bad value “” for attribute “name” on element “input”: Must not be empty.
The “center” element is obsolete. Use CSS instead.
End tag “p” seen, but there were open elements.
Unclosed element “span”.
The “align” attribute on the “div” element is obsolete. Use CSS instead.
The “font” element is obsolete. Use CSS instead.
Element “style” not allowed as child of element “main” in this context. (Suppressing further errors from this subtree.)
CSS: “line-hight”: Property “line-hight” doesn't exist.
Bad value “100%” for attribute “width” on element “iframe”: Expected a digit but saw “%” instead.
The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.
No space between attributes.
Attribute “ class” not allowed on element “a” at this point.
No “p” element in scope but a “p” end tag seen.
The “scrolling” attribute on the “iframe” element is obsolete.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The “marginheight” attribute on the “iframe” element is obsolete.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The “marginwidth” attribute on the “iframe” element is obsolete.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.
Warnings:
The “border” attribute is obsolete. Consider specifying “img { border: 0; }” in CSS instead.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
Attribute “ class” is not serializable as XML 1.0.
The “type” attribute is unnecessary for JavaScript resources.
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