JS中prototype属性-JS原型模式

/*
 *对象方法
 *类方法
* 原型方法
*/
    function People(name) {
        this.name = name;
        this.say = function () {  //对象方法
            alert("my name is  "+this.name);
        }
    }

    People.run = function () {  //类方法（静态方法，只能由类名调用）
        alert("i can run");
    }

    People.prototype.sayChinese = function () {//原型方法
        alert("我的名字是："+this.name);
    }

    var p1 = new People("menglinghua");
    p1.say();
    People.run();
    p1.sayChinese();

    p1.prototype  //无法获取？？？？？？？？
    p1.run();  //无法调用？？？
    p1.sayChinese(); //可以调用
  
    People.say();//无法调用？？？？？？？？
    People.sayChinese();//无法调用？？？？？？？？

    People.prototype.say();//无法调用？？？？？？？？
    People.prototype.run();//无法调用？？？？？？？？

 
/*
*eg1
*/
function baseClass()
{
    this.showMessage = function () {
        alert("baseClass::showMessage()");
    }
}

function extendClass()
{

}

extendClass.prototype = new baseClass();
var extendClassObj = new extendClass();
extendClassObj.showMessage(); //输出"baseClass::showMessage()"


/*
*eg2 两个类含有同名方法
*/
function baseClass() {
    this.showMessage = function () {
        alert("baseClass::showMessage( )");
    }
}

function extendClass() {
    this.showMessage = function () {
        alert("extendClass::showMessage( )");
    }
}

extendClass.prototype = new baseClass();
var extendClassObj = new extendClass();
extendClassObj.showMessage();  //输出"extendClass::showMessage( )"

/*
*eg3 让extendClass的实例调用baseClass的同名方法
*/
function baseClass() {
    this.showMessage = function () {
        alert("baseClass::showMessage( )");
    }
}

function extendClass() {
    this.showMessage = function () {
        alert("extendClass::showMessage( )");
    }
}

extendClass.prototype = new baseClass();
var extendClassObj = new extendClass();
var baseClassObj = new baseClass();
baseClassObj.showMessage.call(extendClassObj);//让【extendClassObj】调用【baseClassObj】的【showMessage】方法
//输出："baseClass::showMessage( )" 

/*
*eg4 
*/
function baseClass()
{
    this.showMessage = function () {
        alert("baseClass::showMessage( )");
    }
    this.baseShowMessage = function () {
        alert("baseClass::baseShowMessage");
    }
}
baseClass.showMessage = function () {
    alert("baseClass::showMessge static");
}

function extendClass()
{
    this.showMessage = function () {
        alert("extendClass::showMessage( )");
    }
}

extendClass.prototype = new baseClass();
var extendClassObj = new extendClass();

extendClassObj.showMessage();//输出：extendClass::showMessage( )
extendClassObj.baseShowMessage();//输出：baseClass::baseShowMessage

baseClass.showMessage.call(extendClassObj);//输出：baseClass::showMessge static

var baseClassObj = new baseClass();
baseClassObj.showMessage.call(extendClassObj);//输出：baseClass::showMessage( )

http://www.cnblogs.com/yjf512/archive/2011/06/03/2071914.html