[Solved] Call function when server time is reached


i have tried my best. Here my Script

<script type="text/javascript">
   var now = new Date();
   var calMillisecs = new Date(now.getFullYear(), now.getMonth(), now.getDate(), 17, 57, 0, 0) - now;

   if (calMillisecs < 0) {
      calMillisecs += 86400000;
   }

   setTimeout(function(){alert("Uhrzeit Erreicht !")}, calMillisecs);
</script>

Works great.

But any Ideas how i can use an official NTP Server and not the client time ?
I tried it with this
http://jehiah.cz/a/ntp-for-javascript
But without success.

Any ideas ?

solved Call function when server time is reached