The MediaList object is an abstract representation in the W3C DOM of a collection of string names for media specified for a particular styleSheet

Returns the number of items in the collection.

Returns the entire string of comma-delimited media names.

Adds or removes a medium type from the list. In Netscape 6.2, the methods are incorrectly named append( ) and delete( ) .

Returns one media name string from the collection corresponding to the item matching the index value in source code order.