function set_cookie(name, value, expires) {    // Cookieの保存
    var path = location.pathname;
    var paths = new Array();
    paths = path.split("/");
    if(paths[paths.length - 1] != "") {
        paths[paths.length - 1] = "";
        path = paths.join("/");
    }

    var extime = new Date().getTime();
    var cltime = new Date(extime + (60 * 60 * 24 * 1000 * expires));
    var exdate = cltime.toUTCString();

    var s = "";
    s += name + "=" + escape(value);
    s += "; path=" + path;
    if(expires > 0) {
        s += "; expires= " + exdate + "; ";
    } else {
        s += "; ";
    }

    document.cookie = s;
}

function get_cookie(name) {    // Cookieの値の取り出し
    var st = "";
    var ed = "";
    if(document.cookie.length > 0) {
        st = document.cookie.indexOf(name + "=");
        if(st != -1) {
            st = st + name.length + 1;
            ed = document.cookie.indexOf(";", st);
            if(ed == -1) ed = document.cookie.length;
            return unescape(document.cookie.substring(st, ed));
        }
    }
    return -1;
}