[CS3] drawing a line between circles

[Gathanderoth]

Ok I want to make a game where there are lots of circles that are all different colours and when you click on two circles that are the same colour a line is drawn between the two circles you clicked on.

I know how to draw a line using actionscript 3 and I can make it draw the line between the two circles but it only works one way. So when I click circle 1 and then circle 2 it draws the line but if I click circle 2 and then circle 1 it doesnt work. How do I get it so it will draw the line no matter which circle I click first. also I am going to have lots of circle so how would I do this with more than two circles.

Here is my .fla file

Cheers,
James