window.addEvent('domready', function(){
  var Tips2 = new Tips($$('.tips'), {
  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);
  }
  });
});