window.addEvent('domready', function(e) {      
      // add animal menu rollovers
      $('animalIcons').getElements('img').each(function(e){
        // if this image isnt the current selected one, then create rollovers
        if (!e.hasClass('active')) {
          var periodPlace = e.src.lastIndexOf('.');
          var rollOverImgSrc = e.src.substring(0,periodPlace) + '-o.' + e.src.substring(periodPlace+1);
          var oldImgSrc = e.src;
          e.addEvent('mouseover',function(event) {
            e.src = rollOverImgSrc;
          });
          e.addEvent('mouseout',function(event) {
            e.src = oldImgSrc;
          });
          
          // preload rollover images
          var i = new Image();
          i.src = rollOverImgSrc;
        }
      });
      
      // add action menu rollovers
      $('actionMenu').getElements('img').each(function(e){
        var periodPlace = e.src.lastIndexOf('.');
        var rollOverImgSrc = e.src.substring(0,periodPlace) + '-o.' + e.src.substring(periodPlace+1);
        var oldImgSrc = e.src;
        e.addEvent('mouseover',function(event) {
          e.src = rollOverImgSrc;
        });
        e.addEvent('mouseout',function(event) {
          e.src = oldImgSrc;
        });
        
        // preload rollover images
        var i = new Image();
        i.src = rollOverImgSrc;
      });
    });