CRM 4.0 - Testear roles en javascript (sacado de otro blog)

function getUserId() {
 try {
  var command = new RemoteCommand("SystemUser", "WhoAmI", "/MSCRMServices/");
  var oResult = command.Execute();
  if (oResult.Success) {
   return oResult.ReturnValue.UserId;
  }
 }catch(e){
 alert("Error while retrieving userid.");
 }
return null;
}


function getUserRoles(userId) {
 try {
  var command = new RemoteCommand("UserManager", "GetUserRoles");
  command.SetParameter("userIds", "" + userId + "");
  var oResult = command.Execute();
  if (oResult.Success) {
   return oResult.ReturnValue;
  } 
 }catch(e){
 alert("Error while retrieving roles.");
 }
return null;
}


function userHasRole(userId, roleName) {
 result = getUserRoles(userId);
 if (result != null) {
  var oXml = new ActiveXObject("Microsoft.XMLDOM");
  oXml.resolveExternals = false;
  oXml.async = false;
  oXml.loadXML(result);
  roleNode = oXml.selectSingleNode("/roles/role[name='" + roleName + "']");
  if (roleNode != null) {
   if (roleNode.selectSingleNode("roleid[@checked='true']") != null)
    return true;
  }
 }
return false;
}



function currentUserHasRole(roleName) {
 userId = getUserId();
 return userHasRole(userId, roleName);
}


//---- Preguntar por el tipo de rol--------------
if( currentUserHasRole('Salesperson') ) {
 alert('true');
 }else{
 alert('false');
}