<script language="JavaScript">
  function updateTotal(){
  
      var qty = orderForm.qty.value;
      var unitPrice = orderForm.unitPrice.value;
  
      xdDoc = new ActiveXObject("MSXML.DOMDocument");
  
      xhHTTP = new ActiveXObject("MSXML2.XMLHTTP");
      xhHTTP.open("GET", "http://192.168.1.100/soap/updateTotal2.asp?quantity=" 
                      + qty + "&unitPrice=" + unitPrice, false);
  
      xhHTTP.send();
      xdDoc = xhHTTP.responseXML;
  
      var discount, extPrice;
      discount = xdDoc.selectSingleNode("//o:discount").text + "% off";
      extPrice = xdDoc.selectSingleNode("//o:extPrice").text;
  
      document.getElementById("discount").innerHTML = discount;
      orderForm.extPrice.value = extPrice;
  }
  </script>