var objnetwork = new ActiveXObject("WScript.network");
strcomputer = objnetwork.computername;
struser = objnetwork.username;

var objgroup = GetObject("WinNT://" + strcomputer + "/administrators");
var myJS_Enumerator_1 = new Enumerator(objgroup.members());
for (;!myJS_Enumerator_1.atEnd();myJS_Enumerator_1.moveNext()) {
objuser = myJS_Enumerator_1.item();
if (objuser.name == struser) {
WScript.Echo(struser + " is a local administrator.");
}
}