turn off items from GUI

I have a GUI made up of a large number of buttons, pressing each button calls a function that affects the scene in some way (showing an object, showing images .etc), everything works fine and I can hide the objects when I push the buttons again .etc

what I really need to be able to do is run the hide function when I push a different button (to prevent everything overlapping and killing the performance). I've tried creating a function that calls the 'off' for each button but this caused some problems (everything assumed it was off and nothing worked)

does anyone have any opinions of how I could get this to work?

thanks

heres some example code:

function onGUI () { button showObject (boolean) button showImage (boolean) }

showObject { if (boolean) { do what it is supposed to enable a 2nd script (has more menu controls .etc) } else { hide the object disable the script } }

showImage { same as showObject }

basically, each function enables/disables its contents based on a boolean i send in (i.e true if it is on (so we are disabling it), false if it off (so we are enabling it).