对js的类进行面向对象扩展，我已经完成，希望高手来探讨

js不好继承，用的时候都是一些很奇怪的方法，比如call，再比如如下

function a(){

this.b = 1

}

function b() {

this.parent =a;

this.parent();

delete this.parent;

}

然后再prototype

for() {

xxxx

}

看起来好丑啊，完全没有韵味，琢磨着，对Function 加个extend方法，然后就有了下边的代码：

Function.prototype.extend = function(parent) {
var _this = this;
var child = function(){
this.parent = parent;
this.parent.apply(this,arguments);
this.me = _this;
this.me.apply(this,arguments);
delete this.parent;
delete this.me;
}
for(var k in parent.prototype) {
child.prototype[k] = parent.prototype[k]
}
return child;
}

然后来做个实验
function a(c) {

this.v_1 = c;
this.setV = function(v) {
this.v_1 = v;
}
}
a.prototype.show = function(){

alert(this.v_1);
}

var b = function(){
this.v_2 = 2;
this.setV2 = function(v) {
this.v_2 = v;
}
}.extend(a);

var c = new b(8);
c.show();
c.setV(2);
c.show();
alert(c.v_2);

c.setV2(3);
alert(c.v_2);


看来看去也没有什么问题，希望高手进来探讨探讨