function init(gr_id){
		var stretchers = $$('div.menu_content'); 
		var togglers = $$('div.display'); 
		var myAccordion = new Fx.Accordion(togglers, stretchers, { opacity: false, alwaysHide: true, transition: Fx.Transitions.quadOut, show: gr_id, duration: 400});
		document.getElementById('sidemenu').style.visibility = 'visible';
	}