Errors:
A document must not include both a “meta” element with an “http-equiv” attribute whose value is “content-type”, and a “meta” element with a “charset” attribute.
Element “script” must not have attribute “defer” unless attribute “src” is also specified.
The “center” element is obsolete. Use CSS instead.
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 “name” on element “input”: Must not be empty.
Bad value “/upload/rg_cop_2009-2012_(russian)_last_version[1].pdf” for attribute “href” on element “a”: Illegal character in path segment: “[” is not allowed.
Stray end tag “b”.
End tag “br”.
Element “div” not allowed as child of element “ul” in this context. (Suppressing further errors from this subtree.)
Bad value “submit” for attribute “type” on element “a”: Subtype missing.
Element “style” not allowed as child of element “div” in this context. (Suppressing further errors from this subtree.)
Attribute “placeholder” not allowed on element “input” at this point.
Attribute “placeholder” is only allowed when the input type is “email”, “number”, “password”, “search”, “tel”, “text”, or “url”.
Duplicate ID “fb-root”.
Element “fb:like” not allowed as child of element “div” in this context. (Suppressing further errors from this subtree.)
The “for” attribute of the “label” element must refer to a non-hidden form control.
Warnings:
The first occurrence of ID “fb-root” was here.
Element name “fb:like” cannot be represented as XML 1.0.
The “border” attribute is obsolete. Consider specifying “img { border: 0; }” in CSS instead.
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