My page has an input field, comboBox and a button. The comboBox displays a list of values that are in a session variable. When the user enters a new value into the input field and clicks a button, I'd like to use AJAX to add the new variable to my session values. How can I get AJAX to call a server side method?
RAD is just an IDE. A development tool. Like Notepad. This is irrelevant in this question.
So you just want to add Ajaxical powers to a JSF webapplication? I can recommend you to take a look for RichFaces or at least its 'sublibrary' Ajax4jsf. It enables seamless Ajax interaction using JSF components. You may find this developer's guide useful: http://www.jboss.org/jbossajax4jsf/docs/devguide/en/html/index.html