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>