<style type="text/css"> html, form { height: 100%; margin: 0px; padding: 0px; } body { font-family: Arial, Helvetica, sans-serif; font-size: 12px; color: #333; height: 100%; margin: 0px; padding: 0px; background-color: #ffffff; } .topBar { width: 100%; padding: 5px; height: 35px; display: block; background-color: #336699; } .topBarLogo { }</style><body><form id="form1" runat="server"><div class="topBar"><table width="100%"><tr><td><div class="topBarLogo"><img src="/_Images/logo.png" /></div></td><td width="100"><a href="\login.aspx?logout=true" class="button">Logout</a></td></tr></table></div><telerik:RadScriptManager runat="server" ID="RadScriptManager1" /><telerik:RadSplitter ID="RadSplitter1" runat="server" Height="100%" Width="100%" BorderSize="0"><telerik:RadPane ID="navigationPane" runat="server" Width="250px" BackColor="#ffffff" Scrolling="Y"><div class="LeftPane">My Nav menu</div></telerik:RadPane><telerik:RadSplitBar ID="RadSplitbar1" runat="server" CollapseMode="Forward" /><telerik:RadPane ID="contentPane" runat="server" ContentUrl="/login.aspx" BackColor="White"></telerik:RadPane></telerik:RadSplitter></form></body>The RadSplitter is rendering with both the browser's horizontal and vertical scrollbars. I suspect it has to do with the topBar div - but I want the splitter to be 100% of the remaining width/height of the browser after the topBar?