// load images
function loadup(llevels) {
  img=new Array(llevels); 
  for (i=1;i<llevels;i++) {
    img[i]=new Image(300,300);
    img[i].src="images/" + i.toString() + ".jpg";
  }
  stopwatch=new Image();
  stopwatch.src="images/stopwatch.gif";
  swwait=new Image();
  swwait.src="images/swwait.gif";
  swblack=new Image();
  swblack.src="images/swblack.gif";
  swwatch=new Image();
  swwatch.src="images/swwatch.gif";
  spacer=new Image();
  spacer.src="images/spacer.gif";
  ls4=new Image();
  ls4.src="images/ls4.gif";
  img[0]=new Image(300,300);
  img[0].src="images/off.gif";
}