function hideshowPagerType() {
  if ( document.getElementById('pagerGuest').checked ) {
    
    document.getElementById('serverPaging').style.display='none';
    document.getElementById('noCellPhones').style.display='none';
    document.getElementById('yesCellPhones').style.display='none';
    document.getElementById('guestPaging').style.display='block';
  }
  
  if ( document.getElementById('pagerServer').checked ) {

    document.getElementById('guestPaging').style.display='none';
    document.getElementById('yesCellPhones').style.display='none';
    document.getElementById('noCellPhones').style.display='none';
    document.getElementById('serverPaging').style.display='block';
  }
}