Ajax Autocomplete for Jquery : How To Send Dynamic Parameters

Question

i am using Ajax Autocomplete for Jquery ( http://www.devbridge.com/projects/autocomplete/jquery/ ) in one of my application. The Search Form looks something lik

Answer 1

All the answers above did NOT work for me (I suspect because I'm passing "POST" data through ajaxSettings variable which might affect "params" but I did not double check).

Anyway all comments gave good hints and I came up with the following:

var data={          
    'phrase': function() {
        return $('#ajax_post').val();
    },
    'activity_id': function() {
        return $('#activity_id').val();
    }
}

var options = {
    noCache: true,
    transformResult: function(response) {
        //whatever
    },
    onSelect: function(suggestion) {
        //whatever
    },  
    serviceUrl: "MyPHP.php",
    ajaxSettings: {
        dataType: "json",
        method: "POST",
        data: data
    }
};  

$("#ajax_post").autocomplete(options);

So I was able to deliver to the PHP script both the content of ajax_post and activity_id input fields.

Note that it's not enough to do:

'phrase': $('#ajax_post').val()

Because as mentioned in other answers the value get static.