"Addressing in Flash" is known as "Targetting". The way we say joe's house address is like below
joe,street no 16,city Mycity,myCoutry
But how can I address my movieclips in flash? Well targeting in flash is done by dot (.) notation. Suppose we want to target a movieclip lying on stage, then we say "_root.myClip", where "myClip" is the name of movieclip on stage.Similarly a movieclip inside a movieclip is targetted by "_root.myClip.insideClip", where "myClip" is on stage and "insideClip" is placed inside "myClip".Ohh, ok then what's "_root" ? "_root" is the main time line of flash. Whe we publish our "fla" file it becomes "swf" file. Now we can say to target our base "swf" file we write "_root".This "_root" is the holder of all other things inside the movie. To better understand the situation, if we say "Earth" contains everything from trees, plants, water to humen, then we can target "Earth" as "_root" and all other things with a dot(.) .Say we want to target "water" we will say
similarly in flash environment we would say
Now, lets see the full address of your home
So, if there is a movieclip inside another movieclip, which is inside another movieclip (called nested movieclips), then we target them as
As to find somebody's place you must know the complete address of his/her house, to do something wiht a particular clip flash must know the complete "target path" to it.