def view_getLoginLogo
      return VIEW_LOGINLOGO if defined? VIEW_LOGINLOGO
      dir = "#{Rails.root}/app/assets/images/lato/"
      if File.exist?("#{dir}/login_logo.svg")
        return "lato/login_logo.svg"
      end
      if File.exist?("#{dir}/login_logo.png")
        return "lato/login_logo.png"
      end
      if File.exist?("#{dir}/login_logo.jpg")
        return "lato/login_logo.jpg"
      end
      if File.exist?("#{dir}/login_logo.gif")
        return "lato/login_logo.gif"
      end
      return view_getApplicationLogo
    end
def view_getLoginLogo
      return VIEW_LOGINLOGO if defined? VIEW_LOGINLOGO
      dir = "#{Rails.root}/app/assets/images/lato/"
      if File.exist?("#{dir}/login_logo.svg")
        return "lato/login_logo.svg"
      end
      if File.exist?("#{dir}/login_logo.png")
        return "lato/login_logo.png"
      end
      if File.exist?("#{dir}/login_logo.jpg")
        return "lato/login_logo.jpg"
      end
      if File.exist?("#{dir}/login_logo.gif")
        return "lato/login_logo.gif"
      end
      return view_getApplicationLogo
    end
This function return the url of login logo.