I got the an image field in my grid view. When mouse over the image it will pop up a bigger image.from coding aspect.

<script language="javascript" type="text/javascript" >
    $().ready(function () {
        //alert("I am in the ready");
        //alert($("img").length);
        $("img").mouseover(function () {
            $(this).width(200);
            $(this).height(200)
        });
        $("img").mouseleave(function () {
            $(this).width(50);
            $(this).height(50)
        });
    });
</script>