Get value from an AJAX generated input/textarea

Get value from an AJAX generated input/textarea

I guess the title says it all. I've generated two checkboxes and two textareas via an ajax requst. When I later on call anoter function I want to get the valus from the textareas and to know if weather the checkboxes are checked or not. But that seem impossible to be as you seem not to be able to select an element generated after the page load, or am I wrong ?