equal( div.css( "z-index" ), "0", "z-index is 0" );
div.animate({ zIndex: 2 }, function() {
equal( div.css( "z-index" ), "2", "z-index is 2" );
equal( div.css( "z-index" ), "0", "z-index is 0" );
div.animate({ zIndex: 2 }, function() {
equal( div.css( "z-index" ), "2", "z-index is 2" );