function createCookie(name,value,hours) {
	if (hours) {
		var date = new Date();
		date.setTime(date.getTime()+(hours*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 null;
}

function eraseCookie(name) {
	createCookie(name,'',-1);
}

function onoffCookie(nazwa) {
	var temp = document.getElementById(nazwa); 
	if( temp != null ) {
		if (temp.style.display == 'block') {
			createCookie(nazwa,'none',1);
			temp.style.display = 'none';
		} else {
			createCookie(nazwa,'block',1);
			temp.style.display = 'block';
		}
	}
}
	
function onoffCookieSet(nazwa) {
	var temp = document.getElementById(nazwa); 	
	var stan = readCookie(nazwa);
	if (stan == 'block') document.getElementById(nazwa).style.display = 'block';
	else if (stan == 'none') document.getElementById(nazwa).style.display = 'none';
	else {
		if (temp.style.display != 'block' && temp.style.display != 'none') document.getElementById(nazwa).style.display = 'block'; // jesli div nie mial ustalonego stanu startowego to domyslnie ukrywa
	}
}