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;
}