var expDays = 30;

function setCookie(name, val) {
        var exp = new Date();
        var cookieTimeToLive = exp.getTime() + (expDays * 24 * 60 * 60 * 1000);
        exp.setTime(cookieTimeToLive);
        document.cookie = name + "=" + escape(val) + "; expires=" + exp.toGMTString();
}

function getCookie(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;
}