function playSoundOver() {
  return;
}

function playSoundClick() {
  return;
}

function stopSound() {
  return;
}



function displayWindow(url){
  x=(screen.availWidth-780)/2;
  y=50;
  width=780;
  height=screen.availHeight-100;
  window.open(url,'', 'toolbar=no,menubar=no,scrollbars,resizable=yes,height='+height+',width='+width+',left='+x+',top='+y);
}