<!DOCTYPE html>
<!--
????1.js是基于prototype(原型)的，而不是基于类
-->
<html lang="en">
<head>
???<meta charset="UTF-8">
???<title>js对象</title>
</head>
<body>
<p id="p1">helloworld</p>
<script>
???var a=document.getElementById("p1");
???a.innerHTML=a.innerHTML+"<br/>"+a.innerHTML.length;//访问对象属性
???a.innerHTML=a.innerHTML.toUpperCase();//访问对象方法
</script>
<input type="button" value="点击按钮遍历对象属性" width="20" height="50" onclick="test1()"><br/>
<p id="p2"></p>
<script>//for...in循环遍历
???function test1(){
???????var x;
???????var a={name:"万涛",age:19,sex:"男"};
???????var txt="";
???????for(x in a){
???????????txt=txt+a[x];
???????}
???????document.getElementById("p2").innerHTML=txt;
???}
</script>
</body>
</html>
js2
原文地址：http://www.cnblogs.com/wantao/p/7965817.html