function makeFieldUppercase(field){
  field.value = field.value.toUpperCase();
}
function formatPhoneNumber(field){
  if(field.value.length!=10){
    return;
  }
  field.value = "(" + field.value.substring(0,3) + ") " + 
    field.value.substring(3,6) + "-" + field.value.substring(6,10);
}