Microsoft Dynamics CRM 4.0 用javascript 获取当前用户

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=\"WhoAmIRequest\" />" + 
"    </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;
var userID=resultXml.getElementsByTagName("UserId")[0].childNodes[0].nodeValue;

crmForm.all.new_ddwc.DataValue=userID;