Columbia.co.cr W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
The “width” attribute on the “table” element is obsolete. Use CSS instead.
The “align” attribute on the “table” element is obsolete. Use CSS instead.
The “border” attribute on the “table” element is obsolete. Use CSS instead.
The “align” attribute on the “td” element is obsolete. Use CSS instead.
Element “area” is missing required attribute “alt”.
No space between attributes.
The “center” element is obsolete. Use CSS instead.
Bad value “true” for attribute “allowfullscreen” on element “iframe”.
The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.
Saw “"” when expecting an attribute name. Probable cause: “=” missing immediately before.
Attribute “"” not allowed on element “img” at this point.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
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The “border” attribute is obsolete.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 “"” is not serializable as XML 1.0.
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