Use as paint, custom polygons and circles

These two days in the study about as drawing problems, after some toss finally came out, (part of the code from programming Macromedia Flash MX)

As:

MovieClip.prototype.drawRegAng = function (x, y, R, num, rotation) {
/* parameter description: x,y: Center coordinate of polygon; R: Polygon radius; num: number of polygon edges; The last one is the rotation angle */
 var tangle = (rotation-90) *math.pi/180;
 var angle = 2*math.pi/num;
 var sin = math.sin;
 var cos = math.cos;
 num++;
 this.moveto (X+r*cos (Tangle), Y+r*sin (tangle));
 while (num--) {
  tangle + = angle;
  This.lineto (X+r*cos (Tangle), Y+r*sin (tangle));
 }
};
This.createemptymovieclip ("loader", 100);
Loader.linestyle (0, 0x000000);
//initialization variable
var r=50,num=5,rota=0;
var x = stage.width/2, y = STAGE.HEIGHT/2;
Loader.drawregang (x, y, R, Num, rota);

Numchange=new Object ();
Numchange.change=function (evt) {
Num=evt.target.value;
}
Rchange=new Object ();
Rchange.change=function (evt) {
R=evt.target.value;
}
Rotachange=new Object ();
Rotachange.change=function (evt) {
Rota=evt.target.value;
}
Bian.addeventlistener ("Change", Numchange);
Jiaodu.addeventlistener ("Change", Rotachange);
Banjing.addeventlistener ("Change", Rchange);
function clicked () {
Loader.clear ();
Loader.linestyle (0, 0x000000);
Loader.drawregang (x, y, R, Num, rota);
}
Rsubmit.addeventlistener ("Click", clicked);

Circular:

As:
Movieclip.prototype.drawoval=function (X,y,rx,ry) {
This.moveto (X+rx,y);
This.curveto (Rx+x,0.4142*ry+y,0.7071*rx+x,0.7071*ry+y);
This.curveto (0.4142*rx+x,ry+y,x,ry+y);
This.curveto ( -0.4142*rx+x,ry+y,-0.7071*rx+x,0.7071*ry+y);
This.curveto (-rx+x,0.4142*ry+y,-rx+x,y);
This.curveto (-rx+x,-0.4142*ry+y,-0.7071*rx+x,-0.7071*ry+y);
This.curveto ( -0.4142*rx+x,-ry+y,x,-ry+y);
This.curveto (0.4142*rx+x,-ry+y,0.7071*rx+x,-0.7071*ry+y);
This.curveto (Rx+x,-0.4142*ry+y,rx+x,y);
}