how can show UpdateProgress bar during the page loading

[anacrab]

\[code\]<asp:UpdateProgress ID="UpdateProgress1" runat="server" DisplayAfter="0" DynamicLayout="true" AssociatedUpdatePanelID="update1"> <ProgressTemplate> <div class="TransparentGrayBack"> </div> <div class="Sample5PageUpdate"> <img src="http://stackoverflow.com/questions/RadControls/Ajax/Skins/Default/ajax-loader4.gif" alt="" /> </div> </ProgressTemplate></asp:UpdateProgress> \[/code\]I am using the updateprogress. And it is working fine. But now i want that the update progress show during the page load. would you suggest what should i do.