继承:

<!DOCTYPE html>
<html>
	<head lang="en">
		<meta charset="UTF-8">
		<title></title>
		<script src="Lib.js"></script>
	</head>
	<body>
		<!--script标签放在body还是head里面并没有什么区别 但是之前那个程序是因为外面有一个文件夹前面才写js/的啊……-->
	</body>
</html>
function People(name){//当做类使用
	this._name=name;
}
People.prototype.say=function(){
	alert("peo-hello"+this._name);
}
function Student(name){
	this._name=name;
}
Student.prototype=new People();
var superSay=Student.prototype.say;
Student.prototype.say= function () {
	superSay.call(this);
	alert("stu-hello"+this._name);
}
var s=new Student("iwen");
s.say();



封***r>

(function () {
			var n="iwens";//只能在当前类中访问
			function People(name){//当做类使用
			this._name=name;
		}
		People.prototype.say=function(){
		alert("peo-hello"+this._name);
	}
	window.People=People;//不写无法被其他类调用
}());
(function(){
			function Student(name){
			this._name=name;
		}
		Student.prototype=new People();
		var superSay=Student.prototype.say;
		Student.prototype.say= function () {
		superSay.call(this);
		alert("stu-hello"+this._name);
	}
	window.Student=Student;
}())//想要他直接执行 所以加了()
var s=new Student("iwen");
s.say();


方便理解的类与对象赋值:
function Person(){
		var _this={}//空对象
		_this.sayHello=function(){
		alert("hello");
	}
	return _this;
}
function Teacher(){
	var _this=Person();
	return _this;
}
var t=Teacher();
t.sayHello();


父类的复写与调用:
function Person(){
		var _this={}//空对象
		_this.sayHello=function(){
		alert("Phello");
	}
	return _this;
}
function Teacher(){
		var _this=Person();
		var surperSay=_this.sayHello;
		_this.sayHello=function(){
		surperSay.call(_this);
		alert("Thello");
	}
	return _this;
}
var t=Teacher();
t.sayHello();


参数传递:
function Person(name){
    var _this={}//空对象
    _this._name=name;
    _this.sayHello=function(){
        alert("Phello"+_this._name);
    }
    return _this;
}
function Teacher(name){
    var _this=Person(name);
    var surperSay=_this.sayHello;
    _this.sayHello=function(){
        surperSay.call(_this);
        alert("Thello"+_this._name);
    }
    return _this;
}
var t=Teacher("iwen");
t.sayHello();


不就是改个字体 结果把我所有代码的缩进全弄没了==