<!doctype html>
<html>
<head>
<title>extjs-json</title>
<script type="text/javascript">
window.onload = function loadPage(){
var obj={
1:"first",
"2":"second"
};
console.log(obj[1]);//打印
obj.sex ="man";//添加
delete obj.sex;//删除
for(var c in obj){//遍历
console.log(c+":",obj[c]);
}
}
</script>
</head>
<body>
</body>
</html>