Autocomplete disallow free text entry?

Question

Is it possible to disallow free text entry in the JQuery UI autocomplete widget?

eg I only want the user to be allowed to select from the list of items that are pre

Answer 1

The combobox option works well if you are using a set list, however if you have a dynamic generated list via a json get, then you can only capture the data on change.

Full example with additional parameters below.

        $("#town").autocomplete(
        {       
            select: function( event, ui ) {
                $( "#town" ).val( ui.item.value );
                return false;
            },        
            focus: function( event, ui ) {
                    $( "#town" ).val( ui.item.label );
                    return false;
                },           
            change: function(event, ui) {
                if (!ui.item) {
                    $("#town").val("");
                }
            },
            source: function(request, response) {
                $.ajax({
                    url: 'urltoscript.php',
                    dataType: "json",
                    data: {
                        term : request.term,
                        country : $("#abox").val()    // extra parameters
                    },                        
                    success: function(data) {
                        response($.map(data,function (item)
                        {                                
                            return {
                                id: item.id,
                                value: item.name
                            };
                        }));
                    }
                });
            },
            minLength: 3
            , highlightItem: true                                
        });