// ustawia ciastko
function setCookie(c_name,value,expiredays) {
	var exdate=new Date();
	exdate.setDate(expiredays);
	document.cookie=c_name+ "=" +escape(value)+((expiredays==null) ? "" : ";expires="+exdate+";path=/");
}
// czyta ciastko
function getCookie(c_name) {
	if (document.cookie.length>0) {
		c_start=document.cookie.indexOf(c_name + "=")
		if (c_start!=-1) { 
			c_start=c_start + c_name.length+1;
			c_end=document.cookie.indexOf(";",c_start);
			if (c_end==-1) {
				c_end=document.cookie.length;
			}
		    return unescape(document.cookie.substring(c_start,c_end));
		} 
	}
	return null;
}