window.addEvent('domready', function(){

   //do your tips stuff in here...

   var youjoomlaTip = new Tips($$('.youjoomla1'), {

      className: 'youjoomla', //this is the prefix for the CSS class

      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);

      }

   });

});