function MutarSelect(){
          
      $(".mutarselect").append("<option value='' class='mutarselect-add'>Agregar nuevo</option>");
  
  
      $(".mutarselect-add").click(function( event ){
          event.preventDefault();
  
          //alert($(this).parent(".mutarselect").attr("id"));
          var father = $(this).parent(".mutarselect").attr("id");
          //var positionReal = $(this).parent(".mutarselect").offset();
          //
          $(this).parent(".mutarselect").hide();
          $("<input type='text' placeholder='nuevo valor' autofocus autocomplete=off style='border:none' class='mutarselect-input " + father +"' >").insertAfter( $($(this).parent(".mutarselect")) );
  
  
      });
  
      $("form").on("keypress", ".mutarselect-input",function( event ){
          
          if ( event.keyCode == '13' ){
              event.preventDefault();
  
              $(this).prev(".mutarselect").prepend("<option value='" + $(this).val()  + "' class='mutarselect-rm'>" + $(this).val() + "</option>");
              $(this).prev(".mutarselect").show();
              $(this).remove();
          
          }
      });
  
  }
  
  
  $(document).ready(function(){
          MutarSelect();
  
  });