change label position dynamic

<div> <asp:UpdateProgress ID="UpdateProgress" runat="server"> <ProgressTemplate> <asp:Image ID="Image1" ImageUrl="waiting.gif" AlternateText="Processing" runat="server" /> <asp:Label ID="Label1" runat="server" Text="Label"></asp:Label> </ProgressTemplate> </asp:UpdateProgress> <ajaxToolkit:ModalPopupExtender ID="modalPopup" runat="server" TargetControlID="UpdateProgress" PopupControlID="UpdateProgress" BackgroundCssClass="modalPopup" /> <asp:UpdatePanel ID="pnlData" runat="server" UpdateMode="Conditional"> <ContentTemplate> <asp:Button ID="btnSubmit" runat="server" Text="Submit" OnClientClick="ChangeUpdateProgress('Please wait Adding....')" onclick=&quo ...