/**
 * Cookie handling 
 */
var expires = new Date ();
var days = 600;
expires.setTime(expires.getTime() + days * (24 * 60 * 60 * 1000));

/**
 * Returns the cookie of a given name
 */
function getCookie (name)
{
	var arg = name + "=";
	var alen = arg.length;
	var clen = document.cookie.length;
	var i = 0;
	while (i < clen) {
		var j = i + alen;
		if (document.cookie.substring(i, j) == arg)
			return getCookieVal (j);
		i = document.cookie.indexOf(" ", i) + 1;
		if (i == 0) break;
	} return null;
}

/**
 * Sets a cookie
 */
function setCookie(cookieName, cookieData, expireDate)
{
	document.cookie = cookieName + "=" + escape(cookieData) + "; expires=" + expireDate.toGMTString();
}