//checks to see if number
      function isNumberKey(evt)
      {
         var charCode = (evt.which) ? evt.which : event.keyCode
         if (charCode > 31 && (charCode < 48 || charCode > 57))
            return false;

         return true;

      }

            function isFloatKey(evt)
      {
         var charCode = (evt.which) ? evt.which : event.keyCode
         if ((charCode > 31 && (charCode < 48 || charCode > 57)) && charCode !=46)
//         alert(charCode);
            return false;

         return true;

      }