How to get which checkbox was CLICKED in a checkboxlist in ASP.NET

[josh88132]

I have an ASP.NET page with a checkboxlist containing a bunch of checkboxes.I would like to know the index of which checkbox was CLICKED. I am not looking for which checkbox was CHECKED since that can be retrieved by using SelectedIndex.Say for example I have the following code\[code\]<asp:CheckBoxList ID="_CheckBoxList" runat="server"> <asp:ListItem Value="http://stackoverflow.com/questions/12605491/0" Selected="True">Apple</asp:ListItem> <asp:ListItem Value="http://stackoverflow.com/questions/12605491/1">Banana</asp:ListItem> <asp:ListItem Value="http://stackoverflow.com/questions/12605491/2" Selected="True">Orange</asp:ListItem></asp:CheckBoxList>\[/code\]So if the user clicks on the Orange checkbox (which would basically deselect it), I would like the output to be 2 since Orange was CLICKED.Thanks.