help playing frames based on _xmouse

Just started learning flash and actionscript two weeks ago.
sorry if this question is too easy.
I'm trying to play frames when the mouse moves left or right.
when the mouse moves right I play the next frame,
subsequently when the mouse moves left I play the previous frame.
Only problem is... I only want to play frames when the mouse is moved inside the movie.
I tried to use an if that specifies the x bounds of the movie...
but don't know what I'm doing...
Can you help with this code?
or suggest an easier way of accomplishing this?

CODE BELOW--

stop();
//WORKS only over entire page
//need it to only work between x values
var point = 0;
var newpoint = 0;
// x values of the movie
if (_xmouse <= 435 && _xmouse >= 114){
     point = _xmouse;
     _root.onMouseMove = function (){
          newpoint = _xmouse;
          // set max frames
          if(point > newpoint && _root.nextFrame() != 15){
               gotoAndPlay(_root.nextFrame());
               point = newpoint;
          }
          else
          // Set min frames
               if (_root.prevFrame != 0){
                    gotoAndPlay(_root.prevFrame());
                    point = newpoint;
               }
       }
}


I only have 75 points available...Sorry.