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

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

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

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

Returns the number of elements in the collection of anchors.

A collection of all a elements with assigned name attributes that make them behave as anchors (instead of links). Collection members are sorted