//語法甘露：
var object =    //定義小寫的object基本類，用于實現(xiàn)最基礎(chǔ)的方法等
{
    isA: function(aType)   //一個判斷類與類之間以及對象與類之間關(guān)系的基礎(chǔ)方法
    {
        var self = this;
        while(self)
        {
            if (self == aType)
              return true;
            self = self.Type;
        };
        return false;
    }
};
 
function Class(aBaseClass, aClassDefine)    //創(chuàng)建類的函數(shù)，用于聲明類及繼承關(guān)系
{
    function class_()   //創(chuàng)建類的臨時函數(shù)殼
    {
        this.Type = aBaseClass;    //我們給每一個類約定一個Type屬性，引用其繼承的類
        for(var member in aClassDefine)
            this[member] = aClassDefine[member];    //復(fù)制類的全部定義到當(dāng)前創(chuàng)建的類
    };
    class_.prototype = aBaseClass;
    return new class_();
};
 
function New(aClass, aParams)   //創(chuàng)建對象的函數(shù)，用于任意類的對象創(chuàng)建
{
    function new_()     //創(chuàng)建對象的臨時函數(shù)殼
    {
        this.Type = aClass;    //我們也給每一個對象約定一個Type屬性，據(jù)此可以訪問到對象所屬的類
        if (aClass.Create)
          aClass.Create.apply(this, aParams);   //我們約定所有類的構(gòu)造函數(shù)都叫Create，這和DELPHI比較相似
    };
    new_.prototype = aClass;
    return new new_();
};
 
//語法甘露的應(yīng)用效果：    
var Person = Class(object,      //派生至object基本類
{
    Create: function(name, age)
    {
        this.name = name;
        this.age = age;
    },
    SayHello: function()
    {
        alert("Hello, I'm " + this.name + ", " + this.age + " years old.");
    }
});
 
var Employee = Class(Person,    //派生至Person類，是不是和一般對象語言很相似？
{
    Create: function(name, age, salary)
    {
        Person.Create.call(this, name, age);  //調(diào)用基類的構(gòu)造函數(shù)
        this.salary = salary;
    },
    ShowMeTheMoney: function()
    {
        alert(this.name + " $" + this.salary);
    }
});
 
var BillGates = New(Person, ["Bill Gates", 53]);
var SteveJobs = New(Employee, ["Steve Jobs", 53, 1234]);
BillGates.SayHello();
SteveJobs.SayHello();
SteveJobs.ShowMeTheMoney();
 
var LittleBill = New(BillGates.Type, ["Little Bill", 6]);   //根據(jù)BillGate的類型創(chuàng)建LittleBill
LittleBill.SayHello();
 
alert(BillGates.isA(Person));       //true
alert(BillGates.isA(Employee));     //false
alert(SteveJobs.isA(Person));       //true
alert(Person.isA(Employee));        //false
alert(Employee.isA(Person));        //true