js小问题

[myeclipse0123]

    function Sing(){
     with(arguments.callee);
	 alert(this.author+":"+this.poem);
  };
	  Sing.author = "李白";
	  Sing.poem = "汉家秦地";
	  Sing();
	  Sing.author = "杜甫";
	  Sing.poem = "日出汉家天";
	  Sing();

为什么打印出来是undefined的啊。这个是悟透JavaScript的源代码

[yixianggao]

看来书中代码没有测试

L@_@K

function Sing(){
	with(arguments.callee)
		alert(author+":"+poem);
};
Sing.author = "李白";
Sing.poem = "汉家秦地";
Sing();
Sing.author = "杜甫";
Sing.poem = "日出汉家天";
Sing();

[aellonxie]

[Quote=引用楼主 myeclipse0123 的回复:]
JScript codefunction Sing(){with(arguments.callee);
alert(this.author+":"+this.poem);
};
Sing.author="李白";
Sing.poem="汉家秦地";
Sing();
Sing.author="杜甫";
Sing.poem="日出汉家天";
Sing();

为什么打印出来是undefined的啊。这个是悟透JavaScript的源代码
[/Quote]


不是this，要么你把对象传进去，要么，直接写对象名，记得实例化