var CollapseBox = Class.create({
  initialize: function() {
  },
  toggle: function(id){
	var target = $(id);
	var area = target.hasClassName('colapsebox-content');
	if (this.tween) this.tween.cancel();
	this.tween = Effect.toggle(id+"-content", 'blind', { duration: 0.5, scaleContent: false, afterFinish:this.change });

  },
  change: function(e){
  	var id = (e.element.id);
  	id = id.split("-content").join("");
	Element.toggleClassName(id, 'closed');
  }
});

var collapsebox = new CollapseBox();