function hideFields(val) {
// hides the irrelavant div in our form.

  if(val == "Cheque") {

     document.getElementById("CardType_optionset").style.display = 'none';
     
     document.getElementById("CardHolderName_text").style.display = 'none';
     
     document.getElementById("CardNumber_text").style.display = 'none';
     
     document.getElementById("CardExpir_date").style.display = 'none';

  } else {
     
     document.getElementById("CardType_optionset").style.display = '';
   
     document.getElementById("CardHolderName_text").style.display = '';
     
     document.getElementById("CardNumber_text").style.display = '';  
     
     document.getElementById("CardExpir_date").style.display = '';       

  }
  updateRequired('EmailForm');

}