Why Java Script populates Lookup ID instead of Lookup Data Value CRM 4.0

var routeLookup = new Array();   
routeLookup = crmForm.all.new_busrouteid.DataValue;   
  
if(routeLookup != null) 
{   
    var routeId = routeLookup[0].id.replace(/^{+|}+$/g, "");   
  
    var serverUrl = "/mscrmservices/2007/crmservice.asmx";   
    var xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");   
    xmlhttp.open("POST",serverUrl,false);   
    xmlhttp.setRequestHeader("Content-Type","text/xml; charset=utf-8");   
    xmlhttp.setRequestHeader("SOAPAction", "http://schemas.microsoft.com/crm/2007/WebServices/Retrieve");   
  
    var message =    
    [   
        "<?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>",   
        "   <Retrieve xmlns='http://schemas.microsoft.com/crm/2007/WebServices'>",   
        "       <entityName>new_route</entityName>",   
        "       <id>", routeId, "</id>",   
        "       <columnSet xmlns:q1='http://schemas.microsoft.com/crm/2006/Query' xsi:type='q1:ColumnSet'>",   
        "           <q1:Attributes>",   
        "               <q1:Attribute>new_busrouteaccountid</q1:Attribute>",   
        "               <q1:Attribute>new_lostpropertynumber</q1:Attribute>",   
        "           </q1:Attributes>",   
        "       </columnSet>",   
        "   </Retrieve>",   
        "</soap:Body>",   
        "</soap:Envelope>"  
    ].join("");   
  
    xmlhttp.send(message);   
    //Capture the result.   
    var resultXml = xmlhttp.responseXML;   
  
    //Check for errors.   
    var errorCount = resultXml.selectNodes('//error').length;   
    if (errorCount != 0)   
    {   
     var msg = resultXml.selectSingleNode('//description').nodeTypedValue;   
     alert(msg);   
    }   
 
    else  
    
{   
        crmForm.all.new_operator.DataValue = resultXml.selectSingleNode("//q1:new_busrouteaccountid").nodeTypedValue;   
        crmForm.all.new_operatorpublicphone.DataValue = resultXml.selectSingleNode("//q1:new_lostpropertynumber").nodeTypedValue;   
    }   
}

                                  

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