function RollOver (obj,val) {
  obj.src = val;
}
function Popup (obj) {
  document.getElementById(obj).style.visibility='visible';

}
function Popclose (obj) {
  document.getElementById(obj).style.visibility='hidden';

}
function Popclall () {
  document.getElementById('Layer2').style.visibility='hidden';
  document.getElementById('Layer3').style.visibility='hidden';

}