Chained Ajax Calls

Chained Ajax Calls

OK i'm as noobie to all of this as a 3 year, but this is what i have so far...


I successfully build a 1st page where i made 3 divs to receive ajaxs calls.
i have the correct code to load the combobox that is getting the data from my db and put it into the 1st div
that data is another combobox that gets the data from the ajax call...

this is working right so far

The problem :
I need the 3rd combobox to make another call to get the final data and put it on the last div, but i cant get this to work....

i've try to put the ajax code on the 1st page , and on the 2nd page but still it wont fire....

it's the first time i get into this, but now i'm totally stuck

I'm using php ajax and jquery.
Can anyone give me a little help...
i think i'm probably not to far away fom an answer but i can“t get there on my own.