or

<appSettings> <add key="Telerik.Web.UI.StyleSheetFolders" value="/Style" /></appSettings><system.web> <httpHandlers> <add verb="*" path="Telerik.Web.UI.WebResource.axd" type="Telerik.Web.UI.WebResource, Telerik.Web.UI, Version=2012.2.918.35, Culture=neutral, PublicKeyToken=121fae78165ba3d4" validate="false" /> </httpHandlers></system.web><telerik:RadStyleSheetManager runat="server" ID="rssm"> <StyleSheets> <telerik:StyleSheetReference Path="core.css" /> </StyleSheets></telerik:RadStyleSheetManager>var grid = $find("<%= RadGrid.ClientID %>"); The above line returns null.