Parallax Function

GEN_positionInParallax = function (thisMovieClip, theBoundsMovieClip, theLeaderMovieClip) {
 //
 //  X...
 //get offset % by comparing theLeaderMovieClip with theBoundsMovieClip
 extraXSpace = (theLeaderMovieClip._width)-(theBoundsMovieClip._width);
 westGap = (theBoundsMovieClip._x)-(theLeaderMovieClip._x);
 leaderWestGapXPercentage = westGap/extraXSpace;
 //set position
 followerExtraXSpace = (thisMovieClip._width)-(theBoundsMovieClip._width);
 thisMovieClip._x = (-(followerExtraXSpace*leaderWestGapXPercentage))+theBoundsMovieClip._x;
 //
 //  Y...
 //get offset % by comparing theLeaderMovieClip with theBoundsMovieClip
 extraYSpace = (theLeaderMovieClip._height)-(theBoundsMovieClip._height);
 northGap = (theBoundsMovieClip._y)-(theLeaderMovieClip._y);
 leaderWestGapYPercentage = northGap/extraYSpace;
 //set position
 followerExtraYSpace = (thisMovieClip._height)-(theBoundsMovieClip._height);
 thisMovieClip._y = (-(followerExtraYSpace*leaderWestGapYPercentage))+theBoundsMovieClip._y;
};