Something

				var dx = _root.Balls[i]._x - _root.Balls[y]._x;
				var dy = _root.Balls[i]._y - _root.Balls[y]._y;
				
				if((dx*dx + dy*dy) < ((20+20) * (20+20))) // Hit
				{
					var hitangle = (Math.atan2(dx, dy)) / Math.PI * 180;
					
					var s1 = Math.sqrt(_root.Balls[i].velocity[0] * _root.Balls[i].velocity[0] + _root.Balls[i].velocity[1] * _root.Balls[i].velocity[1]);
					var s2 = Math.sqrt(_root.Balls[y].velocity[0] * _root.Balls[y].velocity[0] + _root.Balls[y].velocity[1] * _root.Balls[y].velocity[1]);
					
					if(s1 > 0)
					{
						_root.Balls[i].velocity[0] /= s1;
						_root.Balls[i].velocity[1] /= s1;
					}
						
					if(s2 > 0)
					{
						_root.Balls[y].velocity[0] /= s2;
						_root.Balls[y].velocity[1] /= s2;
					}
						
					var len = Math.sqrt(dx*dx + dy*dy);
					
					if (len > 0)
					{
						dx /= len;
						dy /= len;
					}