function getCookie(name) { // get cookie
    var dc = document.cookie;
	var prefix = name + "=";
    var begin = dc.indexOf("; " + prefix);
    if (begin == -1) {
        begin = dc.indexOf(prefix);
        if (begin != 0) return false;
    } else {
        begin += 2;
    }
    var end = document.cookie.indexOf(";", begin);
    if (end == -1) {
        end = dc.length;
    }
    return unescape(dc.substring(begin + prefix.length, end));
}

function setCookie(cookieName,cookieValue,nDays) { // set cookie
	var today = new Date();
	var expire = new Date();
	if (nDays==null || nDays==0) nDays=1;
	expire.setTime(today.getTime() + 3600000*24*nDays);
	document.cookie = cookieName+"="+escape(cookieValue) + "; path=/; expires="+expire.toGMTString();
}