var preloads=[];
   function preload(){
      for(var i = 0; i < arguments.length; i ++){
           preloads[preloads.length] = new Image()
           preloads[preloads.length - 1].src = 'images/' + arguments[i]
      }
   }
   preload('share/pause.gif','share/play.gif','share/replay.gif','share/stop.gif');