col elementcolgroup element that doesn't have a span attribute.spanHTMLTableColElement, same as for colgroup elements. This interface defines one member, span.
If a col element has a parent and that is a colgroup element that itself has a parent that is a table element, then the col element represents one or more columns in the column group represented by that colgroup.
The element may have a span content attribute specified, whose value must be a valid non-negative integer greater than zero.
The span IDL attribute must reflect the content attribute of the same name. The value must be limited to only non-negative numbers greater than zero.