[f8] how to have load movie open a new window...?

programming flash
1

hi all!

i have a m.c. button that when released i want it to load a movie but, i want the movie to open in a new window!

so here is my script now:
b1.onRelease = tutorial;
function tutorial () {
_root.contents.loadMovie(“tutorial_1.swf”);
}

so how would i do this???
thanks!