Hi In my android phonegap app,i have used jquery autocomplete feature.I need to get the keyvalue pair in autocomplete

Here is my example code:

var Person = [{"Prateek":"hello"},{"James":"android"}];

$(".searchbox").autocomplete(Person);

When i type 'j' in the textbox i need to get android instead of james in the autocomplete textbox.But i am getting error and result is not shown in textbox.And i am using autocomplete js which can be used also in asp.net

Please guide me where i am wrong.Thanks In Advance