public function flipHorizontal(dsp:DisplayObject):void
{
var matrix:Matrix = dsp.transform.matrix;
matrix.a=-1;
matrix.tx=dsp.width+dsp.x;
dsp.transform.matrix=matrix;
}
public function flipVertical(dsp:DisplayObject):void
{
var matrix:Matrix = dsp.transform.matrix;
matrix.d=-1;
matrix.ty=dsp.height+dsp.y;
dsp.transform.matrix=matrix;
}