popup image + slide show extender

[new SE]

Hi
I am using Ajax Slide Show extender to show my images.

Everything works fine.

Now what I want is when the anyone clicks on any particular image it should show them that particular image in another window or popup etc.

this is code when user click the image but i dont know then

<asp:ImageButton ID="imgShowImage" runat="server" 
                Height="300" Style="border: 1px solid black;width:auto"
                AlternateText="" onclick="imgShowImage_Click"/>
           
            <asp:Label runat="Server" ID="imageLabel1"/><br />
            <asp:Button runat="Server" ID="prevButton" Text="Prev" Font-Size="Small" />
            <asp:Button runat="Server" ID="playButton" Text="Play" Font-Size="Small" />
            <asp:Button runat="Server" ID="nextButton" Text="Next" Font-Size="Small" />
           
            <ajax:SlideShowExtender ID="slideshowextend1" runat="server"
                TargetControlID="imgShowImage"
                SlideShowServiceMethod="GetSlides"
                AutoPlay="true"
                ImageDescriptionLabelID="imageLabel1"
                NextButtonID="nextButton"
                PlayButtonText="Play"
                StopButtonText="Stop"
                PreviousButtonID="prevButton"
                PlayButtonID="playButton"
                Loop="true" />

anyone plz