hi andy

assuming that are you are in a network using active directory

check out the following jScript about getting the logged in user name.

//Create a WScript.Network object, which provides access to the user data
var objNetwork = new ActiveXObject("WScript.network");
//Retrieve the UserName and write it into the my:UserName field
XDocument.DOM.selectSingleNode("/my:myFields/my:UserName").text =
objNetwork.UserName;
//Retrieve the UserDomain and write it into the my:UserDomain field
XDocument.DOM.selectSingleNode("/my:myFields/my:UserDomain").text =
objNetwork.UserDomain;
//Retrieve the ComputerName and write it into the my:ComputerName field
XDocument.DOM.selectSingleNode("/my:myFields/my:ComputerName").text =
objNetwork.ComputerName;

cheers
Bart