text: 
  function ComboVista(placeholder, ancho, seleccionada) {
  
   var jsonCombo = {
       view: null,
       label: null,
       placeHolder: null,
   };
  
   jsonCombo.view = Ti.UI.createView({
       borderRadius: 2,
       backgroundColor: params.color7,
       width: ancho,
       height: 50,
  	});
  	
   jsonCombo.placeHolder = Ti.UI.createLabel({
       text: placeholder,
       font: { fontFamily: params.fuente_montserrat, fontSize: 10 },
       color: params.color13,
       top: 1,
       left: 5,
       right: 5,
   });
   jsonCombo.view.add(jsonCombo.placeHolder);
  	
   
   var vistaImagen = Ti.UI.createView({
       right: 0,
       height: Ti.UI.FILL,
       width: '10%',
   });
   var imgCombo = Ti.UI.createImageView({
       image: "/images/imgFlechaDerechaGris.png",
       width: 20,
       height: 20,
   }); 
   vistaImagen.add(imgCombo);
   jsonCombo.view.add(vistaImagen);
   
   jsonCombo.label = Ti.UI.createLabel({
       text: seleccionada,
       left: 5,
       bottom: 9,
       width: '85%',
       height: 30,
       color: params.color6,
       font: { fontFamily: params.fuente_montserrat, fontSize: 14 }
   });
   jsonCombo.view.add(jsonCombo.label);
   
  	return jsonCombo;
  
  }
  module.exports = ComboVista;