jQuery获取系统时间和网络时间

1、获取当前系统时间

//判断是否在前面加0
function getNow(s) {
return s < 10 ? '0' + s: s;
}

var myDate = new Date();             

var year=myDate.getFullYear();        //获取当前年
var month=myDate.getMonth()+1;   //获取当前月
var date=myDate.getDate();            //获取当前日

var h=myDate.getHours();              //获取当前小时数(0-23)
var m=myDate.getMinutes();          //获取当前分钟数(0-59)
var s=myDate.getSeconds();

//根据需要设置时间显示的格式
var now=year+'-'+getNow(month)+"-"+getNow(date)+" "+getNow(h)+':'+getNow(m)+":"+getNow(s);
alert(now)

2、获取当前网络时间

     var time= $.ajax({async: false}).getResponseHeader("Date");    //获取网络时间关键代码

    //根据需要设置时间的格式
      function dateTimeFormate(date){
            if(!date){
                return
            }else{
                var d = new Date(date);
                var year = d.getFullYear();
                var month = ('0' + (d.getMonth() + 1)).slice(-2);
                var day = ('0' + (d.getDate())).slice(-2);
                var hour = ('0' + (d.getHours())).slice(-2);
                var minutes = ('0' + (d.getMinutes())).slice(-2);
                var seconds = ('0' + (d.getSeconds())).slice(-2);
                return year + "-" + month + "-" + day + " " + hour + ":" + minutes + ":" + seconds;
            }
        }
        //输出时间
        alert(dateTimeFormate(time))