This is a @property to take care of jsonp stuff if you're using CherryPy.
In your Javascript, (you're using JQuery, right?) you can do
`
$.ajax({url:"localhost:8080/MyMethod", data:{'arg1':'foo'}, dataType:"jsonp", success:onMyMethodComplete});
`
and you will get back your JS datastructure without having to worry about the jsonp stuff yourself.