关于JavaScipt原型链问题求助,Fb.prototype._proto_ = Fa.prototype;
程序代码:
<script language="javascript"> function Fa() { alert("Fa Creator"); } function Fb() { alert("Fb Creator"); } Fb.prototype._proto_ = Fa.prototype; a = new Fa(); b = new Fb(); Fa.prototype.p = "hello"; alert(a.p); //hello alert(b.p); //undefined??? </script>
alert(b.p); //undefined???
为什么呢? 我觉得也是hello啊