var id_old = '';
function pokaz(id) {
	if (id_old == id){
	if (document.getElementById(id_old).style.display == 'none') {
			document.getElementById(id).style.display = 'block';
			createCookie(id);
		} else {
			document.getElementById(id).style.display = 'none';
			eraseCookie();
		}
	} else {
		if (id_old != '' )
		document.getElementById(id_old).style.display = 'none';
		document.getElementById(id).style.display = 'block';
		createCookie(id);
	}
	id_old = id;
}

function showM() {
	var id = readCookie();
	if (id != 0)
	    pokaz(id);
}

function montre(id) {
	var d = document.getElementById(id);
	for (var i = 1; i<=10; i++) {
		if (document.getElementById('smenu'+i))
			document.getElementById('smenu'+i).style.display='none';
	}
	if (d)
	d.style.display='block';
}


function createCookie(id) {
	// 1 dzien
	var date = new Date();
	date.setTime(date.getTime()+(1*24*60*60*1000));
	var expires = "; expires="+date.toGMTString();
	document.cookie = "menu="+id+expires+"; path=/";
}

function readCookie(name) {
	var nameEQ = "menu=";
	var ca = document.cookie.split(';');
	for(var i=0;i < ca.length;i++) {
		var c = ca[i];
		while (c.charAt(0)==' ') c = c.substring(1,c.length);
		if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
	}
	return null;
}

function eraseCookie(name) {
	createCookie(0);
}