I'm using jQuery UI Autocomplete plug-in. I'm giving it an URL to make an ajax call and retrieve data. I want to pass optional data parameters but not as part of URL. In the code they make a getJSON call and pass in 'request' parameter(which is an optional data parameter), however I don't see a way to get at this request parameter.

this.source = function( request, response ) 
{
    $.getJSON( url, request, response );
};