function get_cookie(cookiename) {
    var results = document.cookie.match( '(^|;) ?' + cookiename + '=([^;]*)(;|$)' );
    if (results) {
        return(unescape(results[2]));
    } else {
        return null;
    }
}

function set_cookie(name, value, exp_y, exp_m, exp_d, path, domain, secure) {
    var cookie_string = name + "=" + escape(value);
    if (exp_y) {
        var expires = new Date(exp_y, exp_m, exp_d);
        cookie_string += "; expires=" + expires.toGMTString();
    }
    if (path) { cookie_string += "; path=" + escape(path); }
    if (domain) { cookie_string += "; domain=" + escape(domain); }
    if (secure) { cookie_string += "; secure"; }
    document.cookie = cookie_string;
}