c2.js

原名JSPackager

function C2(){
}
//这里将会在加载期调用C1的构造函数，需要一个前期依赖
C2.prototype = new C1();
C2.prototype.toString = function(){
  return "this is c2";
}
C2.prototype.showMessage = function(){
  return "this is C2,inherit from class C1:"+new C1();
}