Multiple button actions

i have n nos of btn’s on stage .on clicking any btn i want to duplicate a movie clip on stage “circle_mc” & place d copy with equal spacing along y axis…
i dont want to manually put the actions on each btn.the actions can be put on the timeline …like btn.onRelease = function(){ //…actions}
the btns r given instance names btn0,btn1…so on…

pls help.