function loadImage() { 

  for (var i=0; i < 5 ; i++) {
     rollover[i] = new Image();
  }	

  rollover[0].src = "images/00_box_button01_on.gif";
  rollover[1].src = "images/00_box_button02_on.gif";
  rollover[2].src = "images/00_box_button03_on.gif";
  rollover[3].src = "images/00_box_button04_on.gif";
  rollover[4].src = "images/00_box_button05_on.gif";

}