I have a content area in which I would like to display some text when the page loads and when a button is clicked (biography). When another button is clicked (AFT) I would like this text to be replaced by the content of a URL via an iframe.

At the moment I have managed to get the text to appear when the page loads, however I can't get the iframe to replace the text when the AFT button is clicked. Can someone help me?

HTML...