var myimages=new Array()
function preloadimages(){
  for (i=0;i<preloadimages.arguments.length;i++){
    myimages[i]=new Image()
    myimages[i].src=preloadimages.arguments[i]
  }
}

preloadimages("../img/menu_communication_on.gif","../img/menu_dinobirelli_on.gif","../img/menu_racing_on.gif","../img/menu_sport_on.gif")