中国及德国时间JS代码

var timerRunning = false;
function checkDateTime() {
    if (timerRunning) {
        clearTimeout(updatetime);
        timerRunning = false;
    }
    for (var i = 1; i <= 2; i++) {
        var today = new Date();
        var month = today.getMonth() + 1;
        var date = today.getDate();
        if (i == 2){ //德国时间
            if( (month>3 || month==3 && date>24) && (month<10 || month==10 && date<24) ) //夏时制 -6小时
                today = today.dateAdd("h", -6);
            else
                today = today.dateAdd("h", -7);
        }
        var year = today.getYear() + 00;
        month = today.getMonth() + 1;
        date = today.getDate();
        var day = today.getDay();
        var hour = today.getHours();
        var minute = today.getMinutes();
        var second = today.getSeconds();
        var dateTime = addZero(hour) + ":" + addZero(minute) + ":" + addZero(second) + "," + addZero(month) + "/" + addZero(date);
        if (i == 1) //北京时间
            $("#bj_time").text(dateTime);
        else//德国时间
            $("#dg_time").text(dateTime);
    }
    updatetime = setTimeout("checkDateTime()", 1000);
    timerRunning = true;
}

function addZero(num, end) {
    return num < 10 ? "0" + num : num;
}

$(document).ready(function () {
    checkDateTime();
});


/* 得到日期年月日等加数字后的日期 */
Date.prototype.dateAdd = function (interval, number) {
    var d = this;
    var k = { 'y': 'FullYear', 'q': 'Month', 'm': 'Month', 'w': 'Date', 'd': 'Date', 'h': 'Hours', 'n': 'Minutes', 's': 'Seconds', 'ms': 'MilliSeconds' };
    var n = { 'q': 3, 'w': 7 };
    eval('d.set' + k[interval] + '(d.get' + k[interval] + '()+' + ((n[interval] || 1) * number) + ')');
    return d;
}