How do I pass an extra parameter to Jquery Autocomplete field?

Question

I\'m using the JQuery Autocomplete in one of my forms.

The basic form selects products from my database. This works great, but I\'d like to further develop so that o

Answer 1

$('#product').setOptions({
    extraParams: {
        extra_parameter_name_to_send: function(){
            return $("#source_of_extra_parameter_name").val();
        }
    }
})