function imgover(ID,IMG) {
  document.getElementById(ID).src = IMG;
}
function preloadimg(){
  if (document.images){
    var imgFiles = preloadimg.arguments;
    if (document.preloadArray == null) { document.preloadArray = new Array(); }
    var i = document.preloadArray.length;
    with (document) {
      for (var j = 0; j < imgFiles.length; j++) {
        if (imgFiles[j].charAt(0) != "#") {
          document.preloadArray[i] = new Image();
          document.preloadArray[i++].src = imgFiles[j];
        }
      }
    }
  }
}