var img = new Image();

function on(tr) {
  tr.className="on";
}
function off(tr) {
  tr.className="off";
}
function loadImage(url,map)
{
  this.url = url;
  img.src = url;
  img.usemap = map;
  document.image.src = img.src;
}
function popup(url)
{
  window.open(this.href);
  return false;
}