使用jquery／javascript 获取网络时间

一：使用js获取网络时间

 1 var xhr = new XMLHttpRequest();  
 2 if( !xhr ){  
 3    xhr = new ActiveXObject("Microsoft.XMLHTTP");  
 4 }  
 5 xhr.open("HEAD",location.href,true);  
 6 xhr.onreadystatechange=function(){  
 7     if( xhr.readyState == 4 && xhr.status == 200 ){  
 8          alert(dateTimeFormate(xhr.getResponseHeader("Date")));  
 9     }  
10 }  
11 xhr.send(null);

　　日期格式化根据代码

 1 function dateTimeFormate(date){
 2   if(!date){
 3     return
 4   }else{
 5     var d = new Date(date);
 6     var year = d.getFullYear();
 7     var month = ('0' + (d.getMonth() + 1)).slice(-2);
 8     var day = ('0' + (d.getDate())).slice(-2);
 9     var hour = ('0' + (d.getHours())).slice(-2);
10     var minutes = ('0' + (d.getMinutes())).slice(-2);
11     var seconds = ('0' + (d.getSeconds())).slice(-2);
12     return year + "-" + month + "-" + day + " " + hour + ":" + minutes + ":" + seconds;
13   }
14 }

二：使用jquery获取网络时间

1 dateTimeFormate($.ajax({async:false}).getResponseHeader("Date"))