Preloader mc must play at least once

Question

I have a preloader made and it works fine, but I want to add
an "and" statement to the if statement that currently says;
if(_root.getBytesLoaded() == _root.getBytesTotal()) {
gotoAndPlay(3);
I would like to be able to add (theoretically) "and frame of
movieclip equals at least 50" to the "if" statement. The problem
is, I don't know how to translate that into action script.
The preloader is a your typical bar (which is actually
getting bytes loaded) with a movie clip in the background to make
it look a little smoother. I've tried using "_currentframe", but I
think that only gets the frame of when an action takes place like a
mouse click.
my version of the action script looks like this but doesn't
work.
if(_root.getBytesLoaded() == _root.getBytesTotal() &&
movieclipname._currentframe >49) {
gotoAndPlay(3);
}

Answer 1

OK, I figured out that I can in fact use _currentframe, but I
still need to know how to add the "and" statement to the existing
"if" statement.
Any reply would be appreciated even if you say "your
animation is probably stupid. So, don't worry about it."