Ajax Server Side and Client Side confusion clarification needed

Let's imagine an autocomplete widget scenario that grabs it's data from a database.

Let's assume that we have to:

1. Grab the contents from DB1 to be displayed once the user clicks the input field. Then, After the user makes it's choice, we need to:

2. Query the database DB1 for additional data concerning that selection made by the user.

3. Using that data to query another system WEBSERVICE1 and retrieve a response with more data.

4. Finally, display that returned data int开发者_运维技巧o input boxes so that we can work with them.

I'm describing this, so that you can realize that it's not a question of having one server side function, but several that are connected with other files etc... If this counts anything.

My try to describe the process:

Description A)

We need to, at some javascript event, call a php script. Process some stuff, and return back the results to be displayed.

I'm under a mvc "sort of" pattern but my controller isn't able to decide which views will be displayed. Instead, is the view that calls the controller method that she needs. Knowing this:

Can anyone, be kind enough to draw a skeleton or fill the blanks (that are A LOT I realize that and I'm sorry) on Description A above?

:s

Lost, Márcio

I'm not sure exactly what you are looking for, but have to tried using a jqueryUI autocomplete box?

http://jqueryui.com/demos/autocomplete/