Twitter Bootstrap: How to close modal / popover programmatically with jQuery

I am using jquery bootstrap dropdown. I add some input text in dropdown and now what I want to do when I try to submit, it must close the dropdown. Is it any way ?

Here it's the demo of url from twitter bootstrap : http://twitter.github.com/bootstrap/javascript.html#dropdowns

!function ($) {

  var toggle = '[data-toggle=dropdown]'
, Dropdown = function (element) {
    var $el = $(element).on('click.dropdown.data-api', this.toggle)
    $('html').on('click.dropdown.data-api', function () {
      $el.parent().removeClass('open')
    })
  }

Dropdown.prototype = {

constructor: Dropdown

  , toggle: function (e) {
  var $this = $(this)
    , $parent
    , isActive

  if ($this.is('.disabled, :disabled')) return

  $parent = getParent($this)

  isActive = $parent.hasClass('open')

  clearMenus()

  if (!isActive) {
    $parent.toggleClass('open')
    $this.focus()
  }

  return false
}

  , keydown: function (e) {
  var $this
    , $items
    , $active
    , $parent
    , isActive
    , index

  if (!/(38|40|27)/.test(e.keyCode)) return

  $this = $(this)

  e.preventDefault()
  e.stopPropagation()

  if ($this.is('.disabled, :disabled')) return

  $parent = getParent($this)

  isActive = $parent.hasClass('open')

  if (!isActive || (isActive && e.keyCode == 27)) return $this.click()

  $items = $('[role=menu] li:not(.divider) a', $parent)

  if (!$items.length) return

  index = $items.index($items.filter(':focus'))

  if (e.keyCode == 38 && index > 0) index--                                        // up
  if (e.keyCode == 40 && index < $items.length - 1) index++                        // down
  if (!~index) index = 0

  $items
    .eq(index)
    .focus()
}



}

  function clearMenus() {
getParent($(toggle))
  .removeClass('open')


}

  function getParent($this) {
var selector = $this.attr('data-target')
  , $parent

if