$(document).ready(function() {

    //ACCORDION BUTTON ACTION
$('div.accordion_heading').click(function() {
    $('div.accordion_childs').slideUp('normal');
        $(this).next().slideDown('normal');
    });

    //HIDE THE DIVS ON PAGE LOAD
    $("div.accordion_childs").hide();
    $("#nn").slideDown('normal');

});