var currentName = 'foobar';

            var dialog = new Dialog({
                title: 'Rename Layer',
                fields: {'Name': currentName}, // fields shown within the dialog. infers it's a "text" input autom.
                triggers: ['OK', 'Cancel'],
                onOK: function(fields) { // note the field access
                    console.log(fields.name); // got a new name hopefully :)
                }
            });