function ready() {
  $("#my_form").on("submit", function (e) {
    for (var j in someItems) {
      var element = $(someItems[j]);
      $("<input>").attr({type:"hidden", name: element.attr("name"), value: element.val()}).appendTo($(this));
    }

    for (var i = 0; i < someItems2.length; i++) {
      //"element" is visible here ??????
      $("<input>").attr({type:"hidden", name: element.attr("name"), value: element.val()}).appendTo($(this));
    }
  });
});

jQuery(document).ready(ready);
jQuery(document).on("page:load", ready);