$(document).ready(function(){   
    $(".flip").click(function(){   
        $(this).next().slideToggle("slow");   
           
        var src = ($(this).find('.penel_icon').attr("src") === "/assets/img/icon07.gif") ? "/assets/img/icon06.gif" : "/assets/img/icon07.gif";   
        $(this).find('.penel_icon').attr("src", src);    
   
    });   
});