function set(z) {
  for(i=1;i<=z;i++) {
    document.getElementById('s'+i).className='r2';
  }
}
function unset(z) {
  for(i=1;i<=z;i++){
    rval = document.rating.elements['t'+i];
    document.getElementById('s'+i).className='r'+rval.value;
  }
}
function GoTo(url) {
  document.location.href=url;
}