or
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en"><head id="Head1" runat="server"> <style type="text/css"> html, body, form { height: 100%; padding: 0px; margin: 0px; } </style></head><body style="background-color: #FFFFFF; margin-bottom: 0px; margin-top: 0px; margin-left: 0px; margin-right: 0px;"> <form id="form1" runat="server" > <asp:ContentPlaceHolder ID="WMContentPlaceHolder" runat="server"> </asp:ContentPlaceHolder> </form></body></html><telerik:RadAjaxManager ID="ramMain" runat="server" EnableAJAX="true" EnablePageHeadUpdate="false"> <AjaxSettings> <telerik:AjaxSetting AjaxControlID="RadTreeView1"> <UpdatedControls> <telerik:AjaxUpdatedControl ControlID="RadSplitter1" LoadingPanelID="ralpMain" /> </UpdatedControls> </telerik:AjaxSetting> </AjaxSettings></telerik:RadAjaxManager><telerik:RadAjaxLoadingPanel ID="ralpMain" runat="server" ></telerik:RadAjaxLoadingPanel> <telerik:RadSplitter ID="RadSplitter1" runat="server" Width="100%" VisibleDuringInit="false" PanesBorderSize="0" ResizeWithParentPane="true" ResizeWithBrowserWindow="true">