Open single pop up from two different buttons - asp.net

Question

I have two different buttons viz save and update. I want to open single pop-up window for both buttons, then how can I do so.? More over if pop-up is open on save buttons click then when ever it is closed, it should directed to OnClick_save() button event and if it is open from update buttons, on pop-up colse, it should directed to OnClick_Update() buttons click event.
How can I do so??
This is my code
<tr>
<td>
<table id="tblButton" runat="server">
<tr>
<td>
<asp:Button ID="btnAdd" runat="server" Text="Add" Visible="false" />
<asp:Button ID="btnUpdate" runat="server" Text="Update" Visible="false" /> <asp:Button ID="btnDelete" runat="server" Text="Delete" Visible="false" />
<asp:Button ID="btnTargetButton" runat="server" Text="PopUpTarget" Visible="false" />
</td>
</tr>
</table>
</td>
</tr>
</table>
</td>
</tr>
<cc1:ModalPopupExtender ID="ModalPopupExtenderSave" runat="server" TargetControlID="btnTargetButton" PopupControlID="passwordPopUp" DropShadow="true" PopupDragHandleControlID="header" BackgroundCssClass="modalBackground" BehaviorID="ModalPopupExtenderSave" />
</table>
<asp:Panel ID="passwordPopUp" runat="server" Style="display: none; padding: 10px;
border: 1px; border-style: solid;" BackColor="#91C83B" Width="300px" HorizontalAlign="Center"
BorderStyle="Solid" BorderWidth="5px">
<table class="TABLE100">
<tr>
<td colspan="3">
<h3 style="text-align: center;" id="header">
Confirm Password</h3>
</td>
</tr>
<tr>
<td colspan="3">
</td>
</tr>
<tr>
<td>
</td>
<td width="50px">
<asp:Label ID="lblPasswrd" runat="server" Text="Password" Font-Bold="True" Font-Size="Larger"></asp:Label>
</td>
<td>
<asp:TextBox ID="txtPassword" runat="server" SkinID="TextBoxLong"></asp:TextBox>
</td>
</tr>
<tr>
<td>
</td>
<td>
</td>
<td>
</td>
</tr>
<tr>
<td>
</td>
<td>
</td>
<td>
<asp:Button ID="btnSubmit" runat="server" Text="SUBMIT" Width="70px" OnClick="btnSubmit_Click"/>
</td>
</tr>
</table>
</asp:Panel>
Some how I have solved the problem up to certain extent.
Now the problem is three different buttons viz. Insert, Update and delete buttons are responsible for opening pop-up window which in turn opens an ASP:panel the panel contains submit button. So on submit button, can I know which button was responsible for opening a panel.???

Answer 1

You can use a hidden button as modal popup's Okbutton and call then button OnClick from code. from both Save and Updated buttons.

Answer 2

add server side event handlers for each button click. use jquery to show popup for each button, that would be $('#button1').click and $('#button2').click from jquery.