if (document.images){
  ButtonMouseOn=new Array();
  ButtonMouseOver=new Array();
  for (i=0; i<offbutt.length; i++){
    ButtonMouseOn[i]=new Image();ButtonMouseOn[i].src=offbutt[i];
    ButtonMouseOver[i]=new Image();ButtonMouseOver[i].src=onbutt[i];}
}
function MouseOn(ImageName,i) {
if (document.images != null) document.images[ImageName].src = ButtonMouseOn[i].src;}
function MouseOver(ImageName,i) {
if (document.images != null) document.images[ImageName].src = ButtonMouseOver[i].src;}