Uoi.gr W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Bad value “https://api.w.org/” for attribute “rel” on element “link”: The string “https://api.w.org/” is not a registered keyword.
Bad value “http://www.uoi.gr/wp-content/uploads/2015/12/xlogo-white2.png.pagespeed.ic.0KBlXx6v_h.png 295w, http://www.uoi.gr/wp-content/uploads/2015/12/xlogo-white2.png.pagespeed.ic.0KBlXx6v_h.png 295w” for attribute “srcset” on element “img”: Width for image “http://www.uoi.gr/wp-cont…gespeed.ic.0KBlXx6v_h.png” is identical to width for image “http://www.uoi.gr/wp-cont…gespeed.ic.0KBlXx6v_h.png”.
The “sizes” attribute may be specified only if the “srcset” attribute is also present.
The “cellpadding” attribute on the “table” element is obsolete. Use CSS instead.
The “cellspacing” attribute on the “table” element is obsolete. Use CSS instead.
The “width” attribute on the “th” element is obsolete. Use CSS instead.
Duplicate ID “trigger-overlay”.
The element “h4” must not appear as a descendant of the “address” element.
Bad value for attribute “srcset” on element “img”: Width for image “http://www.uoi.gr/wp-cont…gespeed.ic.vXWqsN74M7.png” is identical to width for image “http://www.uoi.gr/wp-cont…gespeed.ic.vXWqsN74M7.png”.
Element “style” 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:
Article lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all articles.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
The first occurrence of ID “trigger-overlay” was here.
Greece GR