function toggleGuests() {

if(navigator.appName.indexOf("Microsoft") > -1)
    var canSee = 'block'; 
  else 
    var canSee = 'table-row-group';
		
  var guestCountField = $('#guestCount');
  theCount = $('OPTION:selected', guestCountField).val();
	
  guest1Tbody = document.getElementById('guest1');
  guest2Tbody = document.getElementById('guest2');
  guest3Tbody = document.getElementById('guest3');

  guest1Tbody.style.display = 'none';
  guest2Tbody.style.display = 'none';
  guest3Tbody.style.display = 'none';

  if(theCount >= 1)
    guest1Tbody.style.display = canSee;
	
  if(theCount >= 2)
    guest2Tbody.style.display = canSee;
	
  if(theCount >= 3)
    guest3Tbody.style.display = canSee;
  
}//function toggleGuests()