1、对象的属性访问：
对象.属性
对象[属性]，但中括号中必须是字符串
2、属性的遍历：
for in方法举例：
var ren={};
ren.name="名字";
ren.eat=function(){
alert("吃饭");
}
for(var i in ren){
alert(ren[i]);
}
3、封装-工厂函数，这种方式格式不规范
function dianshi(color,size,brand){
var tv={};
tv.color=color;
tv.size=size;
tv.brand=brand;
tv.play=function(){
alert("玩");
}
tv.look=function(){
alert("看");
}
return tv;
}
var d1=dianshi("red","42cun","sony");
var d2=dianshi("blue","40cun","长虹");
var d3=dianshi("green","30cun","康佳");
alert(d1.color);
alert(d2.size);
alert(d3.brand);
4、封装-构造函数，这种方式格式更正式
function tv(color,size,brand){
this.color=color;
this.size=size;
this.brand=brand;
this.play=function(){
alert("玩");
}
this.look=function(){
alert("看");
}
}
var d1=new tv("red","42cun","sony");
var d2=new tv("blue","40cun","长虹");
var d3=new tv("green","30cun","康佳");
alert(d1.color);
alert(d2.size);
alert(d3.brand);
5、封装-代码段
prototype方法：将共有的方法和属性添加到代码段中
function tv(color,size,brand){
this.color=color;
this.size=size;
this.brand=brand;
this.look=function(){
alert("看");
}
}
tv.prototype.play=function(){
alert("玩");
}
var d1=new tv();
d1.play();
6、混合方法：几种方式的混合，扬长避短
function tv(color,size,brand){
this.color=color;
this.size=size;
this.brand=brand;
this.look=function(){
alert("看");
}
}
tv.prototype.obj={name:"名字"}
tv.prototype.play=function(){
alert("玩");
}
var d1=new tv();
d1.play();
alert(d1.obj.name);