Flash And Transparency

import flash.geom.Rectangle;
function transparency (MC, s, e, g)
{
    h = Math.ceil (MC._height);
    w = MC._width;
    xp = MC._y;
    var window:Rectangle = new Rectangle (0, 0, w, g);
    for (c = g; c <= h; c += g)
    {
        //when g is small (i.e. 1) and the MC is high, this might lag!
        duplicateMovieClip (MC, 'dupe' + c, _root.getNextHighestDepth ());
        //is it possible to stick them in a container and simply count up the depth - getNext is a bit silly..
        _root['dupe' + c].scrollRect = window;
        //i'm not sure if this would work well with vector drawings, i tested on your bitmap :P
        _root['dupe' + c]._y = c - g + xp;
        t = s * (1 - c / h) + e * c / h;
        if (t < 100)
        {
            if (t < 0)
            {
                _root['dupe' + c]._alpha = 0;
            } else
            {
                _root['dupe' + c]._alpha = t;
            }
        }
        var window:Rectangle = new Rectangle (0, c, w, g);
    }
    MC._visible = false;
    //if we remove MC, then the dupes are removed
}
//usage: transparency(MC, s, e, g)
//MC: movie clip name
//s: starting alpha (100 for not transparent, 0 for invisible - can be set outside)
//e: ending alpha - gradient is made from s to e, if outside of [0,100], will be set to 0 or 100. you can have e>s for increasing alpha.
//g: gap - the size in pixels of each block. 1 or 2 for a smooth gradient, high number for a nice blocky effect
transparency (MV,20,120,6);
//i have a clip on stage called MV :)
//the clip is split into 6-pixel blocks starting from 20% alpha, and going to 100% alpha for the last 1/5 of the picture... i think..