Confirmation of delete for a drop down..

[laptop545]

Hello All,
I have a problem in a project i am doing. Can any1 please help me in this.

I have a drop down list as follows :

<asp:DropDownList  ID="PostActionDDL" runat="server" EnableViewState="false" OnSelectedIndexChanged="activeRegistrant_SelectedIndexChanged"
   AutoPostBack="true" >
                           <asp:ListItem Value="0">Select an Action</asp:ListItem>
                           <asp:ListItem Value="1">View</asp:ListItem>
                           <asp:ListItem Value="2">Delete</asp:ListItem>
       </asp:DropDownList>

And i have the C# code as follows :

 protected void activeRegistrant_SelectedIndexChanged(object sender, EventArgs e)
        {
           ///Some code..
            int selectedAction = Convert.ToInt32(dropList.SelectedValue);

            switch ((RegistrationActions)selectedAction)
            {
                case RegistrationActions.View:
                    Response.Redirect("RegistrantDetails.aspx?id=" + registrationId.ToString());
                    break;

                case RegistrationActions.Delete:
                    DeleteRegistration(registrationId);
                    //some code...
                    break;
            }
        }

Now, everything here is fine and working. But now, if the user selects delete, the data is getting deleted correctly. But without any confirmation. So, if a user selects the delete in the drop down list, i want a pop up to ask " Are you sure you want to delete ?"
And, if the user clicks view, i don't need any pop up.
Can any1 please help me...

Thanks