toolHandlers.cartina = new Object();
toolHandlers.cartina.doop = toolSwitchVisibilitaLocator;

function toolSwitchVisibilitaLocator() {
  if (layerGetStyle('miniCartina').visibility == 'visible') {
    layerHide('miniCartina');
    layerHide('locator');
    document.processa.cartinaState.value = 'no';
  } else {
    layerShow('miniCartina');
    layerShow('locator');
    document.processa.cartinaState.value = 'si';
  }
}