intImage = 2;
function swapImage() {
switch (intImage) {
 case 1:
   IMG1.src = "../gfx/buttons/home-over.gif"
   intImage = 2
   return(false);
case 2:
   IMG1.src = "../gfx/buttons/home-off.gif"
   intImage = 1
   return(false);
 }
}