[jQuery] How get data objects from a php file called via ajax updated?

Hi all, I want to make a selection in a list created by a php-file that is called from another php-file using jQuery and ajax but I can not get any events to the newly created html elements. My example is very limited but shows the main problem. The first php-file has abutton defined like

[jQuery] How get data objects from a php file called via ajax

I am new to javascript and jQuery programming so my problem might be very simple to explain but please bare with me. I want to make a selection in a list created by a php-file that is called from another php-file using jQuery and ajax but it fails. My example is very limited but shows the main