怎么通过js获取服务器当前时间

[langmanlaowo]

如题
贴代码

<script language="JavaScript" type="text/javascript">
            function count_down()
            {
                
                var a=document.getElementById("<%=time1.ClientID%>").value;

                testDay=new Date(a);
                today=new Date();  //这里获得是本机的时间，如何获得服务器的？

                time=(testDay.getTime()-today.getTime())/(24*60*60*1000);
                if(time>0)
                {
                day=Math.floor(time);
                time=(time-day)*24;
                hour=Math.floor(time);
                time=(time-hour)*60;
                minute=Math.floor(time);
                time=(time-minute)*60;
                second=Math.floor(time);
                document.getElementById("<%=show_time.ClientID%>").innerHTML="距离本次团购结束还有</br><span style='color:red'>"+day+"</span>天<span style='color:red'>"+hour+"</span>小时<span style='color:red'>"+minute+"</span>分<span style='color:red'>"+second+"</span>秒";
                
                }
                else
                document.getElementById("<%=show_time.ClientID%>").innerHTML="团购已经结束";

            }
            window.setInterval("count_down()", 1000);
        </script>

注：不要发链接
不要复制、要亲手运行的

[暖枫无敌]

<script language="JavaScript" type="text/javascript">
            function count_down()
            {
                
                var a=document.getElementById("<%=time1.ClientID%>").value;

                testDay=new Date(a);
                today=getServerTime();  //获得服务器时间

                time=(testDay.getTime()-today.getTime())/(24*60*60*1000);
                if(time>0)
                {
                day=Math.floor(time);
                time=(time-day)*24;
                hour=Math.floor(time);
                time=(time-hour)*60;
                minute=Math.floor(time);
                time=(time-minute)*60;
                second=Math.floor(time);
                document.getElementById("<%=show_time.ClientID%>").innerHTML="距离本次团购结束还有</br><span style='color:red'>"+day+"</span>天<span style='color:red'>"+hour+"</span>小时<span style='color:red'>"+minute+"</span>分<span style='color:red'>"+second+"</span>秒";
                
                }
                else
                document.getElementById("<%=show_time.ClientID%>").innerHTML="团购已经结束";

            }
            window.setInterval("count_down()", 1000);
        </script>

function getServerTime(){
var xmlHttp = false; 
//获取服务器时间 
try { 
xmlHttp = new ActiveXObject("Msxml2.XMLHTTP"); 
} catch (e) { 
try { 
xmlHttp = new ActiveXObject("Microsoft.XMLHTTP"); 
} catch (e2) { 
xmlHttp = false; 
} 
} 
 
if (!xmlHttp && typeof XMLHttpRequest != 'undefined') { 
xmlHttp = new XMLHttpRequest(); 
} 
    
xmlHttp.open("GET", "null.txt", false); 
xmlHttp.setRequestHeader("Range", "bytes=-1"); 
xmlHttp.send(null); 
 
severtime=new Date(xmlHttp.getResponseHeader("Date")); 
return severtime.getTime();
}

[子夜__]

<script runat="server" language="javascript">
var a = new Date();
a =a.getFullYear()+ "-"+(a.getMonth()+1)+"-"+a.getDate()+" "+a.getHours()+":"+a.getMinutes();
Response.Write(a);
</script>

[暖枫无敌]

<script language="JavaScript" type="text/javascript">
            function count_down()
            {
                
                var a=document.getElementById("<%=time1.ClientID%>").value;

                testDay=new Date(a);
                today=getServerTime();  //获得服务器时间

                time=(testDay.getTime()-today.getTime())/(24*60*60*1000);
                if(time>0)
                {
                day=Math.floor(time);
                time=(time-day)*24;
                hour=Math.floor(time);
                time=(time-hour)*60;
                minute=Math.floor(time);
                time=(time-minute)*60;
                second=Math.floor(time);
                document.getElementById("<%=show_time.ClientID%>").innerHTML="距离本次团购结束还有</br><span style='color:red'>"+day+"</span>天<span style='color:red'>"+hour+"</span>小时<span style='color:red'>"+minute+"</span>分<span style='color:red'>"+second+"</span>秒";
                
                }
                else
                document.getElementById("<%=show_time.ClientID%>").innerHTML="团购已经结束";

            }
            window.setInterval("count_down()", 1000);
            
            
function getServerTime(){
var xmlHttp = false; 
//获取服务器时间 
try { 
xmlHttp = new ActiveXObject("Msxml2.XMLHTTP"); 
} catch (e) { 
try { 
xmlHttp = new ActiveXObject("Microsoft.XMLHTTP"); 
} catch (e2) { 
xmlHttp = false; 
} 
} 
 
if (!xmlHttp && typeof XMLHttpRequest != 'undefined') { 
xmlHttp = new XMLHttpRequest(); 
} 
    
xmlHttp.open("GET", "null.txt", false); 
xmlHttp.setRequestHeader("Range", "bytes=-1"); 
xmlHttp.send(null); 
 
severtime=new Date(xmlHttp.getResponseHeader("Date")); 
return severtime.getTime();
}

        </script>

[langmanlaowo]

[Quote=引用 3 楼 taomanman 的回复:]
C# code


<script language="JavaScript" type="text/javascript">
function count_down()
{

var a=document.getElementById("<%=time1.ClientID……
[/Quote]


xmlHttp.open("GET", "null.txt", false);
这里的null.txt 是什么意思？

[haa17]

+1[Quote=引用 2 楼 wxr0323 的回复:]

<script runat="server" language="javascript">
var a = new Date();
a =a.getFullYear()+ "-"+(a.getMonth()+1)+"-"+a.getDate()+" "+a.getHours()+":"+a.getMinutes();
Response.Write(a);
</script>
[/Quote]