Getting Null Results after function call jQuery/JSON

Getting Null Results after function call jQuery/JSON

I'm using JSON/jQuery to pre populate a drop down menu. What I want to do, is once I select a plan from the drop down menu and click submit (go button), to get the details about the plan. I'm missing something though.

The drop down menu get's pre populated, but I don't get anything after clicking go. I check the functions and it seems that in the DoPlanSearch() i get the alerts showing the newly constructed URL that gets me the correct JSON. But not sure what happens once the data is processed after that. I say this, because my alert statement in the DoPlanSearchCompleted(data) gets me NULL data. So the problem is there.

I'm just getting started with this, if there is a simpler way to do this, please advise, as I'm not exactly sure what's the best approach. Also, I'm not sure the way .JSON files is setup here works, it does on my Dev server though. I'm sure if you've done this before, this makes more sense to you than me.

Appreciate any help.

Update: code has line: function DoPlanSearchCompleted(data) it should read function UserPlanSearchCompleted(data). The same problem though exists.