$(document).ready(function () {
    $(".flip").click(function () {
        $(".panel").slideToggle("slow");

       if ($("#nfolding").attr('src') == '/Content/openarrow.gif')
           $("#nfolding").attr('src', '/Content/closedarrow.gif');
       else
            $("#nfolding").attr('src', '/Content/openarrow.gif');
   });

   $(".flip1").click(function () {
       $(".panel1").slideToggle("slow");

       if ($("#img1").attr('src') == '/Content/openarrow.gif')
           $("#img1").attr('src', '/Content/closedarrow.gif');
       else
           $("#img1").attr('src', '/Content/openarrow.gif');
   });
});