function setPositionMenu() {
	try { 
		document.getElementById('menager_menu').style.display = readCookie('showMenagerMenu');
	} catch (e) {}
}

function show_hidden_menu(id) {
	
	var arrow = document.getElementById('ar_'+id);
	if (document.getElementById(id).style.display == 'none') {
		setCookie(id,'',604800);
		if (arrow) {
			arrow.src = '/web/images/images/strzalka_up.gif';
			arrow.title = 'Zwiń';
		}
	} else {
		setCookie(id,'none',604800);
		if (arrow) {
			arrow.src = '/web/images/images/strzalka_dw.gif';
			arrow.title = 'Rozwiń';
		}
	}
	visual_effect('toggle_slide',id);
}