or
<telerik:RadTreeList ID="RadTreeList1" runat="server" AllowMultiColumnSorting="True" AllowSorting="True" AutoGenerateColumns="False" DataKeyNames="mynode" DataSourceID="SqlDataSource1" ParentDataKeyNames="mynode2"></telerik:RadTreeList>


<div class="rgHeaderWrapper"> <div class="rgHeaderDiv" id="Control1_SP_Grid1_Grid1_Grid_GridHeader" style="overflow: hidden; margin-right: 17px;"> <table class="rgMasterTable rgClipCells rgClipCells" id="Control1_SP_Grid1_Grid1_Grid_ctl00_Header" style="overflow: hidden; table-layout: fixed; -ms-text-overflow: ellipsis; empty-cells: show;" cellspacing="0"> <div class="rgHeaderWrapper"> <div class="rgHeaderDiv" id="Control1_SP_Grid1_Grid1_Grid_GridHeader" style="overflow: hidden; margin-right: 17px;"> <table class="rgMasterTable rgClipCells rgClipCells" id="Control1_SP_Grid1_Grid1_Grid_ctl00_Header" style="width: 100%; overflow: hidden; table-layout: fixed; empty-cells: show;"> <script type="text/javascript"> function openRadWindow(id) { var oWnd = radopen("../link/" + artid, "RadWindow1"); oWnd.center(); oWnd.show();}</script><a href="#" onclick="openRadWindow('<%idstuffgoeshere%>'); return false;">Open popup</a>SCRIPT5022: InvalidCharacterError ScriptResource.axd, line 796 character 8SCRIPT5007: Unable to get property 'documentElement' of undefined or null reference ScriptResource.axd, line 128 character 2SCRIPT5007: Unable to get property 'documentElement' of undefined or null reference ScriptResource.axd, line 128 character 2