Actionscript 3.0 :: If Mouse Out = False, Listen For Mouse Out?

When I roll over the button content will appear somewhere on the stage,if I roll out the content will disappear.I would like to write extra event, when I click on this button while I am there with MOUSE OVER, it will cancel event listener MOUSE OUT.I try it to solve it with IF function, but I don't know what should be the exact coding>.What I am trying to achive in basic logic is:

While onto the button:
IF MOUSE_DOWN = FALSE
LISTEN for MOUSE_OUT
ELSE GO TO home

this is the script I was trying:

Code: Select allnaturalist.addEventListener (MouseEvent.MOUSE_OVER, mouse_overSection_naturalist);
function mouse_overSection_naturalist (evtObj:MouseEvent) {
gotoAndStop ("naturalist");[code]..........