> I've created an ajax chat client and I am trying to avoid doing a http call > every second to check on messages. I would like to call the web service and > the following occur.
What you want is to apply the Comet pattern where you leave a "hung open" request that gets pushed into by the server when new data is available. Then the client immediately requests another connection which is then hung-open until the next poll/trigger is available. See: http://en.wikipedia.org/wiki/Comet_%28programming%29 -- "He uses statistics as a drunken man uses lamp-posts… for support rather than illumination." Andrew Lang Marc C. Brooks http://musingmarc.blogspot.com
