function onBackButton(e) {

    // Check DOM tree for new page
    cordova.fireDocumentEvent('plugin_touch', {
      force: true
    });

    if (anotherBackbuttonHandler) {
      // anotherBackbuttonHandler must handle the page moving transaction.
      // The plugin does not take care anymore if another callback is registered.
      anotherBackbuttonHandler(e);
    } else {
      cordova_exec(null, null, 'CordovaGoogleMaps', 'backHistory', []);
    }
  }
**************************************************************************
Prevent background, background-color, background-image properties
***************************************************************************