Dissolve = function(elem1,  duration)
	{
	Spry.Effect.Cluster.call(this, {duration: duration});
	var fadeOut = new Spry.Effect.Opacity(elem1, 1, 0, {duration: duration, toggle: true});

	this.addParallelEffect(fadeOut);
	
	};
	Dissolve.prototype = new Spry.Effect.Cluster();
	Dissolve.prototype.constructor = Dissolve;