If I have a play ( |> ) button and want it to switch to a pause ( || ) button once clicked, how can this be done. i thought I could do this using the button rollover effect, but even if I set by pause and hit buttons to the play symbol, when the person moves the mouse around, the pause button reappears always. I need it to change to play if it is pause, and stay at play and then if clicked again I need it to change to pause and stay that way and so on.