checkbox + editing textbox concatenating one field

Hi I am tasked with constructing a checkbox with a textbox in the the end, if the value of the textbox was changed it must concatenate and update one single value. Eg.: I have a list of two courses with a a name and a number: course botanicals 101 course botanicals 102 Where 101 and 102 must be inside a textbox so the user can change his value I would like to ask you for some guidelines about how can i do this task using pear quickform, i do use the moodle project. Thank's in advance +------------------------------- Ângelo Marcos Rigo http://www.u4w.com.br ------------------------------+