MSCRM javascript Fetchxml

Code

//Get Reference Unit Price

function getRefUnitPrice(oproductId)
{
  var aryRet=new Array(3);
  
  var discountNodes=getDiscountNodes(oproductId);
    if (discountNodes!=null)
       {
            var stdAmount;
             var maxCnt=(discountNodes.length>2?2:discountNodes.length);
             if (maxCnt>0)
             {
                //std unit price 
                  aryRet[0]=new Object();
               var lowquantity=discountNodes[0].selectSingleNode("./discounttypeid.lowquantity").text;
                aryRet[0].caption=(parseInt(lowquantity)-1).toString()+"PCS";
                aryRet[0].value=parseFloat(discountNodes[0].selectSingleNode("./amount").text);
                stdAmount=parseFloat(aryRet[0].value);
                 aryRet[0].value=aryRet[0].value.toFixed(2);
                setControl("esp_ref_perunitprice1",aryRet[0]);

             }
                          
           for ( var i = 0; i < maxCnt; i++ ) 
           {
                  
                 var discount;
                  if (discountNodes[i].selectSingleNode("./discounttypeid.isamounttype").text=="1")
                  {
                    discount=discountNodes[i].selectSingleNode("./discounttypeid.amount").text;
                  aryRet[i+1]=new Object();
                    aryRet[i+1].caption=discountNodes[i].selectSingleNode("./discounttypeid.lowquantity").text;
                     aryRet[i+1].caption+="PCS~";
                     aryRet[i+1].caption+=discountNodes[i].selectSingleNode("./discounttypeid.highquantity").text;
                     aryRet[i+1].caption+="PCS"
                    aryRet[i+1].value=stdAmount-parseFloat(discount);
                    aryRet[i+1].value= aryRet[i+1].value.toFixed(2);
                    setControl("esp_ref_perunitprice"+(i+2).toString(),aryRet[i+1]);
                   }
                  else
                 {
                  aryRet[i+1]=new Object();
                     discount=discountNodes[i].selectSingleNode("./discounttypeid.percentage").text;
                    aryRet[i+1].caption=discountNodes[i].selectSingleNode("./discounttypeid.lowquantity").text;
                     aryRet[i+1].caption+="PCS~";
                     aryRet[i+1].caption+=discountNodes[i].selectSingleNode("./discounttypeid.highquantity").text;
                     aryRet[i+1].caption+="PCS";
                    aryRet[i+1].value=stdAmount* (1-parseFloat(discount)/100);
                    aryRet[i+1].value.toFixed(2);
                    setControl("esp_ref_perunitprice"+(i+2).toString(),aryRet[i+1]);

                  }
                  
           }
       }

}
//Han Jianxing 
//set control caption and text for Text Control
//fieldValue.value =Text
//fieldValue.caption=Display Name
function setControl(fieldName, fieldValue)
{
   var fieldObjData = crmForm.all[fieldName];
   var fieldObjTcControl = document.getElementById( fieldName + "_c" );
    fieldObjData.innerText=fieldValue.value;
    fieldObjTcControl.innerText=fieldValue.caption;

}

function getDiscountNodes(oproductId)
{
var  fetchXml=
[
"<fetch mapping='logical'>",
    "<entity name='productpricelevel'>",
        "<attribute name='amount'/>",
        "<attribute name='transactioncurrencyid'/>",
        "<filter type='and'>",
            "<condition attribute='pricelevelid' operator='eq' value='{9439FF4D-8613-DE11-B063-001EC9B6EAFD}'/>",
            "<condition attribute='productid' operator='eq' value='"+oproductId+"'/>",
        "</filter>",
        "<link-entity name='discount' from='discounttypeid' to='discounttypeid' link-type='outer'>",
            "<attribute name='amount'/>",
            "<attribute name='highquantity'/>",
            "<attribute name='isamounttype'/>",
            "<attribute name='lowquantity'/>",
            "<attribute name='percentage'/>",
            "<attribute name='transactioncurrencyid'/>",
            "<order attribute='lowquantity'/>",
        "</link-entity>",
    "</entity>",
"</fetch>"
].join("");

  fetchXml=fetchXml.replace(/</g,'&lt;')
  fetchXml=fetchXml.replace(/>/g,'&gt;')

  var xml = 
  [ 
 "<?xml version='1.0' encoding='utf-8'?>",
  "<soap:Envelope xmlns:soap=\"http://schemas.xmlsoap.org/soap/envelope/\" ",
  "xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" ",
  "xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\">", 
  GenerateAuthenticationHeader(),
   "<soap:Body>", 
  "    <Fetch xmlns=\"http://schemas.microsoft.com/crm/2007/WebServices\">" ,
   " <fetchXml>",
    fetchXml,
      " </fetchXml>",
    "    </Fetch>",
  "</soap:Body>",
  "</soap:Envelope>"
].join("");
  var resultXml = executeSoapRequest("Fetch",xml);
  var node=resultXml.selectSingleNode("//error");
  if (node!=null)
  {  
      alert(node.xml);
  }
 else
  {
     var fetchResult= resultXml.selectSingleNode("//FetchResult");
     if (fetchResult!=null)
      {
           fetchResult=fetchResult.text;
     var xmlDoc=new ActiveXObject("Microsoft.XMLDOM");
     xmlDoc.async=false;
     xmlDoc.loadXML(fetchResult);
      return xmlDoc.selectNodes("//result");

     }
  
  }
 return null;
}

// Helper method to execute a SOAP request
function executeSoapRequest(action, xml)
{
  var actionUrl = "http://schemas.microsoft.com/crm/2007/WebServices/";
  actionUrl += action;
  
  var xmlHttpRequest = new ActiveXObject("Msxml2.XMLHTTP");
  xmlHttpRequest.Open("POST", "/mscrmservices/2007/CrmService.asmx", false);
  xmlHttpRequest.setRequestHeader("SOAPAction",actionUrl);
  xmlHttpRequest.setRequestHeader("Content-Type", "text/xml; charset=utf-8");
  xmlHttpRequest.setRequestHeader("Content-Length", xml.length);
  xmlHttpRequest.send(xml);

  var resultXml = xmlHttpRequest.responseXML;
  return resultXml;
}

// Helper method to return a single node value from XML
function getNodeValue(tree, el)
{
  var retVal = null;
  var e = null;
  e = tree.getElementsByTagName(el);

  if (e != null && e[0] != null) {
    retVal = e[0].firstChild.nodeValue;
  }
  return retVal;
}

// Helper method to return a multiple node value from XML
function getMultipleNodeValues(tree, el)
{
  var retVal = new Array();
  var e = null;
  e = tree.getElementsByTagName(el);

  for(i = 0; i < e.length; i++) {
    retVal[i] = e[i].firstChild.nodeValue;
  }

  return retVal;
}