Loading new sounds using load techniques

ok

i have one song thats loaded when the site pops up.

now i have 5 other songs that i want to be played when the user clicks on the song.

how do i stop the song from playing and the other one starting??
without a stop button?

mySound = new Sound();
mySound1 = new Sound();
mySound2 = new Sound();
mySound3 = new Sound();
mySound4 = new Sound();
mySound.loadSound(“intro.mp3”,true);