在我自己的库创建了函数 getCurrentTime 。它是日期和时间的通用获取器和转换器。此函数可以从时间戳（以微秒为单位）创建日期。

In my own library I created the function getCurrentTime. It's a versatile getter and converter of date and time. This function can create dates from timestamps in microseconds. It allows you to create clocks, calendars, countdown timer, etc.

months = "Jan:31;Feb:28;Mar:31;Apr:30;May:31;Jun:30;Jul:31;Aug:31;Sep:30;Oct:31;Nov:30;Dec:31";
function getCurrentTime(unixTimeStamp)
{
    if (unixTimeStamp)
    {
        this.dateObject = new Date(unixTimeStamp);
    }
    else
    {
        this.dateObject = new Date();
    }
    // Time
    this.dateObject.h = this.dateObject.getHours();
    this.dateObject.m = this.dateObject.getMinutes();
    if (this.dateObject.m < 10)
    {this.dateObject.m = "0" + this.dateObject.m;}
    this.dateObject.s = this.dateObject.getSeconds();
    if (this.dateObject.s < 10)
    {this.dateObject.s = "0" + this.dateObject.s;}

    //Date
    this.dateObject.y = parseInt(this.dateObject.getFullYear());
    this.dateObject.mo = this.dateObject.getMonth()+1;
    if (this.dateObject.mo < 10)
    {this.dateObject.mo = "0" + this.dateObject.mo;}
    this.dateObject.d = this.dateObject.getDate();
    if (this.dateObject.d < 10)
    {this.dateObject.d = "0" + this.dateObject.d;}
    this.today = this.dateObject.d + "/" + this.dateObject.mo + "/" + this.dateObject.y;
    this.now = this.dateObject.d + "/" + this.dateObject.mo + "/" + this.dateObject.y + " " + this.dateObject.h + ":" + this.dateObject.m + ":" + this.dateObject.s;
    this.dateStamp = Date.parse(this.dateObject.mo+"/"+this.dateObject.d+"/"+this.dateObject.y);

    //these are the objects returned by getCurrentTime() next to hour, minutes, seconds, year, month and date.
    this.dateObject.fullDate = this.dateObject.d + " " + months.split(/;/)[this.dateObject.mo-1].split(/:/)[0] + " " + this.dateObject.y;
    this.dateObject.timeZoneOffset = dateObject.getTimezoneOffset(); //in minutes.
    this.dateObject.today = this.today;
    this.dateObject.now = this.now;
    this.dateObject.dateStamp = this.dateStamp;

    return this.dateObject;
}

    timeStamp = <%= ConvertToTimestamp(DateTime.UtcNow).ToString() %>
    setInterval(clock, 1000);

    function clock()
    {   
        timeStamp += 1000;
        var timeObj = getCurrentTime(timeStamp);
        var timeString = timeObj.h + ":" + timeObj.m + ":" + timeObj.s;
        console.log(timeString);
    }

此函数没有 unixTimeStamp 获取客户端时间设置，但是如果使用aspx <％= ConvertToTimestamp（DateTime.UtcNow）.ToString（）％> 将日期变量加载到其中，它将从得到的时间戳更新。如何获取时间戳：

This function without unixTimeStamp gets the clients time settings, but if you load a date var into it with aspx <%= ConvertToTimestamp(DateTime.UtcNow).ToString() %> it will update from the time stamp it got. How to retrieve time stamp:

public double ConvertToTimestamp(DateTime value)
{
    //create Timespan by subtracting the value provided from
    //the Unix Epoch
    TimeSpan span = (value - new DateTime(1970, 1, 1, 0, 0, 0, 0).ToLocalTime());

    //return the total milliseconds (which is a UNIX timestamp * 1000)
    return (long)span.TotalMilliseconds;
}

http://jsfiddle.net/3Lp4mwpn/ ：示例

请注意， getCurrentTime 返回一个比显示时间更多的可能性的对象。它可以为您提供多种日期格式。

Please note that getCurrentTime is returning an object with more possibilities than showing time. It can provide you with multiple date formats.