Twitter Bootstrap 3 alerts per JavaScript

CoffeeScript

window.bootstrapAlert = (type, message) ->
  $('#alert_message').text message
  $('#alert').addClass "alert-#{type}"
  $("#alert").slideDown()
  
  setTimeout (->
    $("#alert").slideUp(400, ->
      $('#alert').removeClass "alert-#{type}"
    )
  ), 5000

HTML

<div class='container-fluid'>
  <div class="row">
    <div class="col-md-12">  
      <div id="alert" class="alert alert-dismissible" role="alert" style="display:none;">
        <button type="button" class="close" data-dismiss="alert" aria-label="Close"><span aria-hidden="true">&times;</span></button>
        <span id="alert_message"></span>
      </div>
    </div>
  </div>
</div>