function jstacity_chk(form_flds)
{
   var error_msg;
   var field_name = "";
   var error = "";

   for(var i = 0; i < form_flds.length; i++) {
      var e = form_flds.elements[i];

      //check that minimum values have been met
      if (e.name == "iata") {
	 field_name = "IATA/ARC Number";
	 if ((!validNumbers(e.value)) || (e.value == null) ||
	      (e.value == "") || (e.value.length < 8)) 
	    error += "\n" + field_name;
      }
      if (e.name == "agency_initial") {
	 field_name = "Agency Initial";
	 if (((!validChars(e.value)) && (!validNumbers(e.value))) || (e.value == null) || (e.value == ""))
	    error += "\n" + field_name;
      }

   }
   if (!error) return true;

   error_msg = "Please enter a valid: \n"
   error_msg += error + "\n";

   alert(error_msg);
   return false;

}