$(function() {
    $("#btn_callback").click(function(){
            $("#iframe_disp_header").toggle("normal");
            
    })
});

//jQuery Effect
(function($){$(document).ready(function(){
    $('a.effect').css({background:'#fff'}).mouseover(function(){
        $(this).children().stop().css({opacity:0.2}).animate({opacity:1},500);
    });
});})(jQuery);