title: bootstrap modal issue in chrome
body: <p>I have a bootstrap modal in my asp.net mvc code that it's body bind in runtime.
  first time I click on the some button and modal work good (body return from controller by jquery ajax).</p>
  
  <p>then must change model’s body dynamically , it works good too(by jquery Ajax and json). then I close modal.
  second time I click on some button , modal work but with problem .
  the problem is scrollbar of modal's body is enable but not working , like that the modal is lock .
  this problem is in chrome , but in IE I have not that.
  my code for modal :</p>
  
  <pre><code>...
  success: function (response) {
  $('#myModal').html(response);
  $('#myModal').modal({ show: true, backdrop: false, keyboard: false });
  ...
  </code></pre>
  
  <p>I change css : <code>overflow:hidden</code> and <code>position:fix</code> but it's not work</p>