window.addEvent('domready',function(){      
		  var tips = new Tips($$('.plot1','.plot2'), {
			initialize:function(){
				this.fx = new Fx.Style(this.toolTip, 'opacity', {duration: 300, wait: false}).set(0);
			},
			onShow: function(toolTip) {
				this.fx.start(1);
			},
			onHide: function(toolTip) {
				this.fx.start(0);
			}
		});
		
	});