JQuery form plugin

form.js

$(function ($) {
  $.extend({
    form: function (url, data, method) {
      if (method == null) method = 'POST';
      if (data == null) data = {};

      var form = $('<form>').attr({
        method: method,
        action: url,
      }).css({
        display: 'none'
      });

      var addData = function (name, data) {
        if ($.isArray(data)) {
          for (var i = 0; i < data.length; i++) {
            var value = data[i];
            addData(name + '[]', value);
          }
        } else if (typeof data === 'object') {
          for (var key in data) {
            if (data.hasOwnProperty(key)) {
              addData(name + '[' + key + ']', data[key]);
            }
          }
        } else if (data != null) {
          form.append($('<input>').attr({
            type: 'hidden',
            name: String(name),
            value: String(data)
          }));
        }
      };

      for (var key in data) {
        if (data.hasOwnProperty(key)) {
          addData(key, data[key]);
        }
      }

      return form.appendTo('body');
    }
  });
});
// Usage example:
// $.form('/submit', { foo: 'bar' }).submit();