jQuery(function() {
                jQuery("#tags2").autocomplete({
                        source: function(request,response) {
                                var requestIndex = 0;
alert('Request: "'+request.term+'"');
                                $.ajax({
                                        url: "test_autoc.pl",
                                        type: 'POST',
                                        data: "term=" + request.term,
                                        processData: false,
                                        contentType: "application/json; charset=ISO-8859-1",
                                        dataType: "text/plain",
                                        cache: false,
                                        autocompleteRequest: requestIndex += 1,
                                        success: function(data,status) {
                                                if (this.autocompleteRequest === requestIndex) {
                                                        response(data);
                                                }
                                        },
                                        error: function() {
                                                if (this.autocompleteRequest === requestIndex) {
                                                        response([]);
                                                }
                                        }
                                });
                        },
                        minLength: 2
                });
        });