JS调用服务器时间的方法

<font size="2">
<span id=serverTime>正在同步网站服务器时间...</span>
<script>
var dayNames = new Array("星期日","星期一","星期二","星期三","星期四","星期五","星期六");
var xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
xmlhttp.open("GET", "http://www.phpstudy.net", false);
xmlhttp.setRequestHeader("Range", "bytes=-1");
xmlhttp.send();
var tts =new Date(xmlhttp.getResponseHeader("Date"));
setInterval("tts.setSeconds(tts.getSeconds()+1);serverTime.innerHTML='<font size=2>' + tts.getYear()+'年'+(tts.getMonth()+ 1)+'月'+tts.getDate()+'日'+' '+tts.getHours()+':'+tts.getMinutes()+':'+tts.getSeconds()+' '+ dayNames[tts.getDay()] +'</font>';",1000);
</script></font>

世界校时服务器

time-a.nist.gov
time-b.nist.gov
time.nist.gov
time-nw.nist.gov
nist1.datum.com
nist1-sj.datum.com
nist1-dc.datum.com
nist1-ny.datum.com
nist1-aol-ca.truetime.com
clock.via.net
clepsydra.dec.com