Preventing page refresh after buttonx_action() or hyperlinkx_action()?

Question

This is the original coade i had....
public String aboutus_action() {
String about = "blah blah blah blah"
; getApplicationBean1().setMainTXT(about);
return null;
I thought this might do it...but it stil refreshes the page. I have music playing and im trying to prevent the music to reload with the page. I tried using page fragment, but that refreshes as well......hmmm
public void aboutus_action() {
String about = "blah blah blah blah"
; getApplicationBean1().setMainTXT(about);
//return null;
}

Answer 1

I have a static text field bounded to the application bean which when a user clicks a html link, the static text is replaced with the correct text.
I have a small flash mp3 player that is running that is being refreshed and causes it to be reloaded. I tried using a page fragment but that gets refreshed as well. Perhaps I should just use a pop up?