function start() {

  if (document.images) {
   }
}
function imgOn(imgName) {
   if (document.images) {

   von=new Image();
   von.src="Images/handv-on.gif";
   hon=new Image();
   hon.src="Images/handh-on.gif";


   document[imgName].src=eval(imgName.charAt(0) + "on.src");
   }
}

function imgOff(imgName) {
   if (document.images) {

   voff=new Image();
   voff.src="Images/handv.gif";
   hoff=new Image();
   hoff.src="Images/handh.gif";

   document[imgName].src=eval(imgName.charAt(0) + "off.src");
   }
}