$(document).ready(function() {
    //Set default open/close settings
    $('.acc_container').hide(); //Hide/close all containers
    //$('.acc_trigger:first').addClass('active').next().show(); //Add "active" class to first trigger, then show/open the immediate next container

    //On Click
    $('.acc_trigger').click(function(){
        if($(this).is(':visible')) {
            $(this).removeClass('active').next().slideUp();
        }
        if( $(this).next().is(':hidden') ) { //If immediate next container is closed...
            $('.acc_trigger').removeClass('active').next().slideUp(); //Remove all "active" state and slide up the immediate next container
            $(this).toggleClass('active').next().slideDown(); //Add "active" state to clicked trigger and slide down the immediate next container
        }
        return false; //Prevent the browser jump to the link anchor
    });
});