colSpan
td - This attribute contains a positive integer indicating the number of consecutive columns the <code><td></code> element spans. If not present, its default value is <code>1</code>. th - This attribute contains a positive integer indicating the number of consecutive columns the <code><th></code> element spans. If not present, its default value is <code>1</code>.
trait Attr
class Object
trait Matchable
class Any