window.addEvent('domready', function() {
        var Tips1 = new Tips($$('.popup'), {
          maxOpacity: 1,  
          className: 'custom',
          //showDelay: 0,
          //hideDelay: 0,        
          initialize:function(){
            this.fx = new Fx.Style(this.toolTip, 'opacity', {duration: 500, wait: false}).set(0);
          },
          onShow: function(toolTip) {
            this.fx.start(1);
          },
          onHide: function(toolTip) {
            this.fx.start(0);
          }
        });
        
      });