var newWin;

function musicWin() {

  if (!newWin || newWin.closed) {
   newWin =window.open('bgsound.asp','musicpopup','status,width=20,height=20,top=0,left=0,toolbar=0,location=0,directories=0,status,menubar=0,scrollbars=0,resizable=0');
  newWin.blur();
 
  }
  else {

  window.onbeforeunload = newWin.close();
  

  }
}