Select only one object MC

hi,

how can i make it so that the viewer can only click on one object MC and not multiple ones. When the click the MC, i have a function that happens, but i only want one MC able to be selected at once, not all of them.

so, if one is clicked, then another is clicked… it needs to reset the first one etc.

hopefully this explains clear enough the concept.

any help is appreciated, im fairly new to actionscripting and programming in general.

thanks
z