js/jquery中 遍历JSON

<script language="javascript">
 function e(){
    var json=[{"kl_id":"2","kl_title":"Test date","kl_content":"Test date","kl_type":"1","id":"1"},{"kl_id":"2","kl_title":"Test","kl_content":"Test","kl_type":"1","id":"2"}]
    
    for (var one in json)
    {
        for(var key in json[one])
        {
            alert(key);    //key
            alert(data[one][key]);    //value
        }
    }
 }
 </script>