AS3生成随机字符串

这段代码会生成一个4位的随机数

 

private function GenerateCheckCode():String
{
	var ran:Number;
	var number:Number;
	var code:String;
	var checkCode:String = '';
	for(var i:int = 0; i<4; i++){
         ran = Math.random();
         number = Math.round(ran*10000);
         if(number %2 === 0)
         	{
                      code = String.fromCharCode(48+(number % 10));//如果是2的倍数则生成一个数字，0的ASCII码是48
         	}
         	else
        	{
                     code = String.fromCharCode(65+(number % 26));
        	}
       checkCode += code;
	}
	return checkCode;
}