postback on click for type ahead drop down

Question

I have a type a head drop down list that I created. Clearly I had to turn the AutoPostBack to false because otherwise it would post back as the user was typing. But I want to poast back when use has made his selection.

I don't wanna use a submit button or anything like that. Long story, just trust me it's not the solution for my situation.

In the javascript that does the type ahead when the use clicks enter I post back. That work great.

However whast about when the user click with the mouse? So I use the onblur event to postback. However that requires clicking outside of the drop down list.

I want the postback to happen when they click the new item. So like a postback when itemchanged, but only if I changed it by clicking on it.

Any ideas???