var accordion;
var displayEl;

window.addEvent('load', function() { 
   displayEl = ($('cartProgress')) ? (0) : (1);

    accordion = new Accordion('#marginContent div.menu_hdr', '#marginContent div.menu_content_inside', {
    	opacity: false,
    	alwaysHide: true,
    	display: displayEl,
    	onActive: function(toggler, element){
    		toggler.addClass('active');
    		toggler.removeClass('inactive');
    	},

    	onBackground: function(toggler, element){
    		toggler.removeClass('active');
    		toggler.addClass('inactive');
    	}
    }, $('marginContent'));
 });