Little help for the newbie here please :-)

Hi all,
I am a newb to flash, and i am gonna ask a question that is probly gonna sound pritty basic, but here i go " i wanna create a site with the menu down the left hand side, and when the buttons on the menu are clicked, the “page” that i want to display, i want to load to the right of that… now i am wondering, whats easist, to load the page from a text file into a text feild, or to load a html file in there, or what :s

Any help would be great, thanks