Applying action to many objects

Question

How can i apply an action to many instances of the same
object or different objects without the need of writting the same
code tens of times ???
Like i have 10 copies of a circle and i want in the first
frame to set their x positions to 100, can i do this in one step
instead of writing the code for each one???
Thanx

Answer 1

Thanks man for helping, and ur method worked with the example
i gave ( the circles ). But the thing that i'm trying to do is the
following:
i have some walls and i want to test if a circle i made (
which the user can move by arrows ) hits the walls or not. i could
made it for one wall by using hit test function. but the method u
gave me didnt work with this. i wrote:
for(var i=1; i<=5; i++){
if ( this["wall" + i].hitTest(ball) ){
also i tries the opposite:
for(var i=1; i<=5; i++){
if (ball.hitTest(this["wall" + i]) ){
and THANX