Changing a Inputfields with Tab in Mobile version of keyboard. (C#, NGUI)

Question

Is posible make a option to change a input field with this button in mobile keyboard? Keyboard in my smartphone I dont know how to make something like that in my application. I add to update this

 void Update()
    {
        if (emailInput.isSelected)
        {
            if (nextInput != null && Input.GetKeyDown(KeyCode.Tab))
            {
                UICamera.selectedObject = nextInput;
            }
        }
    }

With Public Game Object to each Input.