var myimages=new Array()

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

function changeimage(towhat){
  if (document.images){
    document.images.targetimage.src=towhat.src
  }
}