javascript real time display of Beijing time method

This article illustrates the real-time display of Beijing time by javascript. Share with you for your reference. The details are as follows:

Beijing time is displayed in real time on this page. Changing the time zone can also be used to display the world time. The code is as follows:

<script type="text/javascript"> 

Date.prototype.strftime = function(format){

    var o = {

      "M+" :  this.getMonth()+1,  //month

      "d+" :  this.getDate(),     //day

      "h+" :  this.getHours(),    //hour

      "m+" :  this.getMinutes(),  //minute

      "s+" :  this.getSeconds(), //second

      "q+" :  Math.floor((this.getMonth()+3)/3),  //quarter

      "S"  :  this.getMilliseconds() //millisecond

    }

    if(/(y+)/.test(format)) {

        format = format.replace(RegExp.$1, (this.getFullYear()+"").substr(4 - RegExp.$1.length));

    }

   for(var k in o) {

    if(new RegExp("("+ k +")").test(format)) {

      format = format.replace(RegExp.$1, RegExp.$1.length==1 ? o[k] : ("00"+ o[k]).substr((""+ o[k]).length));

    }

   }

    return format;

}

function UTCToLocalTimeString(d, format) {    

     var   timeOffsetInHours = (new Date().getTimezoneOffset()/60)  + -10;    

    d.setHours(d.getHours() + timeOffsetInHours);

    return d.strftime(format);

}

</script>

<script >

    setInterval(function(){var time = UTCToLocalTimeString(new Date(),'yyyy/MM/dd hh:mm:ss');document.getElementById("bjTime").innerHTML = time;},1000);

</script>

<span  id="bjTime"></span>

I hope this article is helpful for you to design javascript program.