11.4 根据时区显示日期

    <script>
        window.onload = initDate;
        function initDate() {
            var now = new Date();
            document.body.appendChild(document.createTextNode(dateZeroZoom(now, 8)));
        }
        function dateZeroZoom(date ,offset) {
            var now = date;
            var dateStr = now.toUTCString();
            dateStr = dateStr.substr (0,dateStr.length - 3);
            now.setTime(Date.parse(dateStr));
            now.setHours(now.getHours() + parseInt(offset));
            return now;
        }
    </script>