ReferenceError: Error #1070: Method addchild not found on flash.display.MovieClip

I typed this into my adobe flash ide


var bitmapData:BitmapData = new BitmapData(100,100);
var bitmap:Bitmap = new Bitmap(bitmapData);
super.addchild(bitmap);

and compile it, the error pop up like the above (in the title)
[COLOR=“Red”]ReferenceError: Error #1070: Method addchild not found on flash.display.MovieClip[/COLOR]

I don’t understand, could someone point out what is the error in my code? :puzzle: