<
radT:RadTreeViewID="trvFromInternalContactList"runat="server"CheckBoxes="True"ExpandDelay="0"Skin="Rtl"SkinsPath="~/Uil/Pages/Skins"AfterClientCheck="AfterCheckFromContact"Height="400px"Width="263px">



</radT:RadTreeView>

 
<inputid="txtFromInternalContact"type="hidden"runat="server"/>



function AfterCheckFromContact(node)

    {

    

                    document.getElementById("txtFromInternalContact").  value =""; 

                                       

               var InternalTreeView = <%= trvFromInternalContactList.ClientID %>;

              

               

                        for (i=0; i < InternalTreeView.AllNodes.length; i++)

                        {

                            if(InternalTreeView.AllNodes[i].Checked)

                                {

                                    document.getElementById("txtFromInternalContact").  value = document.getElementById("txtFromInternalContact").  value +','+ InternalTreeView.AllNodes[i].Value ;                                    

                                 }

                        } 

                          

    }