function $(id) {
	return document.getElementById(id);
}

function createCookie(name,value,days) {
	if (days) {
		var date = new Date();
		date.setTime(date.getTime()+(days*24*60*60*1000));
		var expires = "; expires="+date.toGMTString();
	}
	else var expires = "";
	document.cookie = name+"="+value+expires+"; path=/";
}
function readCookie(name) {
	var nameEQ = name + "=";
	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 'none';
}

function blokMenu(link, id) {
	var blok = $(id);
	if(blok.style.display == 'none') {
		blok.style.display = 'block';
		link.title = 'Zwiń';
		createCookie('status_'+id, 'block', 0);
	} else {
		blok.style.display = 'none';
		link.title = 'Rozwiń';
		createCookie('status_'+id, 'none', 0);
	}
}

function rozwinMenu() {
	var sidebar = $('sidebar');

	var links = document.getElementsByTagName('a');
	for(var i = 0; i < links.length; i++)
	{
		if(links[i].className == 'white') {
			var id = 'status_'+links[i].rel;
			$(links[i].rel).style.display = readCookie(id);
		}
	}
};