Stupid question...but how can i tell if something is within the stage bounds?

I have a bunch of images going on all at once, some on the stage, and some off, and i would like to find a way of telling whether or not they are currently on the stage or not…

I know i can do the whole

[LEFT]checkStage = [COLOR=#993300]function[/COLOR] COLOR=#000000[/COLOR] [COLOR=#000000]{[/COLOR]
[COLOR=#993300]if[/COLOR] [COLOR=#000000]([/COLOR]COLOR=#000000[/COLOR] && COLOR=#000000[/COLOR] && [COLOR=#000000]([/COLOR]mc.[COLOR=#993300]_y[/COLOR] >= [COLOR=#000000]0[/COLOR][COLOR=#000000])[/COLOR]&&[COLOR=#000000]([/COLOR]mc.[COLOR=#993300]_y[/COLOR] >=[COLOR=#993300]Stage[/COLOR].[COLOR=#993300]height[/COLOR][COLOR=#000000])[/COLOR][COLOR=#000000])[/COLOR] [COLOR=#000000]{[/COLOR]
[COLOR=#f000f0]//have mc do whatever here[/COLOR]
[COLOR=#000000]}[/COLOR]
[COLOR=#000000]}[/COLOR];
[/LEFT]

but…i have a TON of stuff i would have to do that for…so i’m hoping for an easy way out :stuck_out_tongue:

like

 [LEFT]checkStage = [COLOR=#993300]function[/COLOR] [COLOR=#000000]([/COLOR][COLOR=#000000])[/COLOR] [COLOR=#000000]{[/COLOR]
[COLOR=#993300]if[/COLOR] [COLOR=#000000]([/COLOR]mc==[COLOR=#993300]visible[/COLOR][COLOR=#000000])[/COLOR][COLOR=#000000]{[/COLOR]
    [COLOR=#f000f0]*//have mc do whatever here*[/COLOR]
[COLOR=#000000]}[/COLOR]

[COLOR=#000000]}[/COLOR];
[/LEFT]

that way i can satisfy my laziness AND achieve what i’m trying to do without having to deal with long winded paths and a bunch of else if’s