How-to create form on the fly and send via POST method by using JQuery

create-and-send-form-on-the-fly.js

$(function(){
  // create form on the fly
  var $new_form = $('<form>', {
      'action': '<?php echo BASE_URL; ?>/operation/reset_member_password',
      'method': 'POST',
      'target': '_top'
  }).append(jQuery('<input>', {
      'name': 'member_id',
      'value': member_id,
      'type': 'hidden'
  }));

  // send form
  $new_form.submit();
});

it seems that you have to append form to the body for submit to work, so last instruction should become:

$new_form.appendTo('body').submit();