AutoCompleteExtender Partial Refresh Of An UpdatePanel

Hi,

I've seen this question asked before in various forms but none seem to fit what I'm looking for.

I have an AutoCompleteExtender control tied to a WebMethod which pulls data from a database. Upon selecting a value, I want to initiate the refresh of an UpdatePanel. I have a solution at the moment which invokes a Javascript "__doPostBack" call on the UpdatePanel when the AutoCompleteExtender OnClientItemSelected event is triggered however this performs a full page refresh, which isn't what I want.

Could anyone please offer some advice on how I might get this to work?

Thanks in advance,

K