<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
<title></title>
<script type="text/javascript">
var json= [{"name":"a"},{"name":"b"},{"name":"c"}];
var str = '[{"name":"abacd"},{"name":"b"},{"name":"c"}]';
var aToStr=JSON.stringify(json);
var bToObj=JSON.parse(str);
alert(typeof(aToStr)); //string
alert(typeof (bToObj));//object
alert(bToObj[0]["name"]);
</script>
</head>
<body>
</body>
</html>