function changeCarrier(selectCarrier){
      isIE = navigator.appName.indexOf("Microsoft") != -1;
      if (selectCarrier.options[ selectCarrier.selectedIndex ].text == 'Other'){
         document.getElementById('phone_email_tr').style.display = (isIE) ? "inline" : "table-row";
      }
      else {
         document.getElementById('phone_email_tr').style.display = 'none';
      }
}