Calling a c# method in java script in specfic interval of time

Iam creating a User Control .ascx & .ascx.cs in which i need to call a c#.net method "CompareTime()" in an interval of time.Below is the code but its not calling the c# method
<script>
var rTimer;
var sds ;
TimeTick();
function TimeTick()
{
      sds =  new Date();
      if(rTimer)
      {
            clearTimeout(rTimer);
      }
      rTimer = setTimeout('TimeTick()', 1000);
      <%CompareTime();%>;
}
</script>
can any one help me
thanks
dr
DharaniravindranAsked:
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dorwardCommented:
You cannot interrupt server side processing to wait for client side events.

Everything runs on the server.
Then everything runs on the client.

(Well, that's a little simplistic, the page could still be being generated on the server while the client side stuff is being processed by the browser).

First the browser requests something.
Then the server sends back an entire resource as the response.

You can't have the browser request something. Get half a response back. Send more information back to the server. Then get the other half of the response back.

The way to approach this problem would be to have your ASP output a JavaScript variable with the server time and then do all the rest of the processing on the client.

Another option is to use XMLHttpRequest to send back another request to the server without loading a new page, and then to process the data it returns.

http://jibbering.com/2002/4/httprequest.html

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