JS操作Cookie

function setCookie(name, value) {
        var argv = setCookie.arguments;
        var argc = setCookie.arguments.length;
        var expires = (argc > 2) ? argv[2] : null;
        var LargeExpDate = null;
        if (expires != null) {
            LargeExpDate = new Date();
            LargeExpDate.setTime(LargeExpDate.getTime()
            + (expires * 1000 * 3600 * 24));
        }
        document.cookie = name
            + "="
            + escape(value)
            + ((expires == null) ? "" : ("; expires=" + LargeExpDate.toGMTString()));
    }

    /**
     * 獲取Cookie
     * 
     * @param {}
     *            Name
     * @return {}
     */
    function getCookie(Name) {
        var search = Name + "=";
        if (document.cookie.length > 0) {
            offset = document.cookie.indexOf(search);
        if (offset != -1) {
            offset += search.length;
            end = document.cookie.indexOf(";", offset);
        if (end == -1)
            end = document.cookie.length;
            return unescape(document.cookie.substring(offset, end));
        } else
            return "";
        }
    }
    /**
    * 從緩存中清除Cookie
    * 
    * @param {} name
    */
    function clearCookie(name) {
        var expdate = new Date();
        expdate.setTime(expdate.getTime() - (86400 * 1000 * 1));
        setCookie(name, "", expdate);
    }