运用递归随机出与上一个数不重复的数

var count:int=0;

var randomNum:int;

function recursion():void

{

	randomNum = Math.round(Math.random() * 2 + 1);

	if (count != randomNum)

	{

		count = randomNum;

	}

	else

	{

		recursion();

	}

}