Loading Image for Reset is not necessary

See more:

ASP.NET

Hi,
I am Sending an Email from Asp.net application by clicking on a Submit button. I used an Image for Loading when sending an Email, and after sending it shows 'Email Sent Successfully'. Another button (Reset) is for Clearing all the textbox fields. When I am click the submit button it is showing the image Loading correctly but also it is showing the Reset button and the loading image

<asp:ScriptManager ID="scriptmanager" runat="server"></asp:ScriptManager>
    <script language="javascript" type="text/javascript">
        // Get the instance of PageRequestManager.
        var prm = Sys.WebForms.PageRequestManager.getInstance();
        // Add initializeRequest and endRequest
        prm.add_initializeRequest(prm_InitializeRequest);
        prm.add_endRequest(prm_EndRequest);
        // Called when async postback begins
        function prm_InitializeRequest(sender, args) {
            // get the divImage and set it to visible
            var panelProg = $get('divImage');
            panelProg.style.display = '';
            // reset label text
            var lbl = $get('<%= this.lblStatus.ClientID %>');
            lbl.innerHTML = '';
            // Disable button that caused a postback
            $get(args._postBackElement.id).disabled = true;
        }
        // Called when async postback ends
        function prm_EndRequest(sender, args) {
            // get the divImage and hide it again
            var panelProg = $get('divImage');
            panelProg.style.display = 'none';
            // Enable button that caused a postback
            $get(sender._postBackSettings.sourceElement.id).disabled = false;
        }
         </script>

<tr><td align="center">
               <asp:Button ID="btnsubmit" runat="server" Text="Submit" CssClass="buttons"
                        onclick="btnsubmit_Click" CausesValidation="true" />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
               <asp:Button ID="btnreset" runat="server" Text="Reset" CssClass="buttons" CausesValidation="false"
                        onclick="btnreset_Click" />
               </td>
               <td>
               </td>
               </tr>
               <tr><td>
               <asp:Label ID="lblStatus" runat="server" ForeColor="Red"></asp:Label>
              <div id="divImage" style="display:none">
                    <asp:Image ID="img1" runat="server" ImageUrl="~/images/progress.gif" />
                    Sending...
               </div>

Here My Problem is I am getting the Sending Image also for Reset Button
how can i show it only for the submit button