理解JavaScript中的原型prototype

function People(name)
{
 this.name=name;
 //對(duì)象方法
 this.Introduce=function(){
 alert("My name is "+this.name);
 }
}
//類方法
People.Run=function(){
 alert("I can run");
}
//原型方法
People.prototype.IntroduceChinese=function(){
 alert("我的名字是"+this.name);
}
//測(cè)試
var p1=new People("Windking");
p1.Introduce();
People.Run();
p1.IntroduceChinese();

A.prototype = new B();

function baseClass()
{
 this.showMsg = function()
 {
 alert("baseClass::showMsg"); 
 }
}
function extendClass()
{
 
}
extendClass.prototype = new baseClass();
instance = new extendClass();
instance.showMsg(); // 顯示baseClass::showMsg

function baseClass()
{
 this.showMsg = function()
 {
 alert("baseClass::showMsg"); 
 }
}
function extendClass()
{
 this.showMsg =function ()
 {
 alert("extendClass::showMsg");
 }
}
extendClass.prototype = new baseClass();
instance = new extendClass();
instance.showMsg();//顯示extendClass::showMsg

extendClass.prototype = new baseClass();
instance = new extendClass();
var baseinstance = new baseClass();
baseinstance.showMsg.call(instance);//顯示baseClass::showMsg

<script type="text/javascript">
function baseClass()
{
 this.showMsg = function()
 {
 alert("baseClass::showMsg"); 
 }
 
 this.baseShowMsg = function()
 {
 alert("baseClass::baseShowMsg");
 }
}
baseClass.showMsg = function()
{
 alert("baseClass::showMsg static");
}
function extendClass()
{
 this.showMsg =function ()
 {
 alert("extendClass::showMsg");
 }
}
extendClass.showMsg = function()
{
 alert("extendClass::showMsg static")
}
extendClass.prototype = new baseClass();
instance = new extendClass();
instance.showMsg(); //顯示extendClass::showMsg
instance.baseShowMsg(); //顯示baseClass::baseShowMsg
instance.showMsg(); //顯示extendClass::showMsg
baseClass.showMsg.call(instance);//顯示baseClass::showMsg static
var baseinstance = new baseClass();
baseinstance.showMsg.call(instance);//顯示baseClass::showMsg
</script>