$.mobile.back = function() {
        var nav = window.navigator;

        // if the setting is on and the navigator object is
        // available use the phonegap navigation capability
        if( this.phonegapNavigationEnabled &&
            nav &&
            nav.app &&
            nav.app.backHistory ){
            nav.app.backHistory();
        } else {
            window.history.back();
        }
    };