The urns() method of rows is described in chapter: javascript all urns( )

Returns a collection of row objects (among all objects within the current collection) with tags that match the tagName parameter.

Returns a single tr object or collection of tr objects corresponding to the element matching the parameter string value.

Returns a single tr object or collection of tr objects corresponding to the element matching the index value (or, optionally in IE, the index

Returns the number of elements in the collection of rows.

Provides a collection of all tr element objects contained in a single table , tbody , tfoot , or thead element object. The rows collectio