用javascript调用WebService,RetrieveDynamicEntity的方式取出EntityProperty的Value

function getDynamicEnitity(entityName, entityId,attributeNames)
{
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>" +
" <Execute xmlns=\"http://schemas.microsoft.com/crm/2007/WebServices\">" +
" <Request xsi:type=\"RetrieveRequest\" ReturnDynamicEntities=\"true\">" +
" <Target xsi:type=\"TargetRetrieveDynamic\">" +
" <EntityName>"+entityName+"</EntityName>" +
" <EntityId>"+entityId+"</EntityId>" +
" </Target>" +
" <ColumnSet xmlns:q1=\"http://schemas.microsoft.com/crm/2006/Query\" xsi:type=\"q1:ColumnSet\">" +
" <q1:Attributes>" +
getAttributeNamesString(attributeNames)+
" </q1:Attributes>" +
" </ColumnSet>" +

" </Request>" +
" </Execute>" +
" </soap:Body>" +
"</soap:Envelope>" +
"";

var xmlHttpRequest = new ActiveXObject("Msxml2.XMLHTTP");

xmlHttpRequest.Open("POST", "/mscrmservices/2007/CrmService.asmx", false);
xmlHttpRequest.setRequestHeader("SOAPAction","http://schemas.microsoft.com/crm/2007/WebServices/Execute");
xmlHttpRequest.setRequestHeader("Content-Type", "text/xml; charset=utf-8");
xmlHttpRequest.setRequestHeader("Content-Length", xml.length);
xmlHttpRequest.send(xml);

var resultXml = xmlHttpRequest.responseXML;
return resultXml;
}

function getEntityPropertyValue(resultXml, attributeName)
{
// Create an XML object to parse the results.
var xmlDoc=new ActiveXObject("Microsoft.XMLDOM");
xmlDoc.async=false;
xmlDoc.loadXML(resultXml.xml);

var ret=xmlDoc.selectSingleNode("//Property[@Name='"+attributeName+"']");

//ret.text enough for return xml;
//in other case this may not enough be careful for this.
if (ret!=null)
return ret.text;
else
return null;

}
function getAttributeNamesString(attributes)
{

var strRet="";
for(i=0;i<attributes.length;i++)
{
strRet+=("<q1:Attribute>"+attributes[i]+"</q1:Attribute>") ;

}
return strRet;
}