Custom easing - AS2

programming flash
1

Hi - I need to set a mouse-controlled scrolling animation to ease when it starts and when it stops in AS2.

Here’s my current onEnterFrame script. Might be a little crude, but it succeeds in starting and stopping the animation when the mouse rolls off the movie. Moves left on one side and right on the other. I just want the starting and stopping to be eased a bit.

Can anyone help? Thanks in advance.

_root.onEnterFrame = function() {
if(_root._ymouse<10){
myVar=false;
}
if(_root._ymouse>408){
myVar=false;
}
if(_root._ymouse>20 and _root._ymouse<398){
myVar=true;
}
if(_root._xmouse<180 and _root._xmouse>9 and myVar==true){
ImageBar.prevFrame();
}
if(_root._xmouse>779 and _root._xmouse<890 and myVar==true){
ImageBar.nextFrame();
}
}