//http:drusunlimited.com
MovieClip.prototype.reflex = function() {
    var reflejo:MovieClip = this.duplicateMovieClip(this._name+"reflejo", this.getDepth()+100);
    reflejo._yscale = -100;
    reflejo._y = this._y+this._height*2;
    var degrade:MovieClip = reflejo.createEmptyMovieClip("degrade_mc", 1);
    degrade.fillType = "linear";
    degrade.colors = [0xFFFFFF, 0xFFFFFF];
    degrade.alphas = [100, 80];
    degrade.ratios = [150, 255];
    degrade.matrix = {matrixType:"box", x:0, y:0, w:this._width, h:this._height, r:90/180*Math.PI};
    with (degrade) {
        beginGradientFill(fillType, colors, alphas, ratios, matrix);
        lineStyle(5, 0xFF00FF, 0);
        moveTo(0, 0);
        lineTo(this._width, 0);
        lineTo(this._width, this._height);
        lineTo(0, this._height);
        moveTo(0, 0);
        endFill();
    }
};
//Uso:
obj_mc.reflex();