title: Ajax async : false freezes web page during loading in slow network
body: <p>I use jquery AJAX for web page and use async : false option as following. My client's network is very slow. When I try to load the web page from the server web page is slow and all the controls are freeze. Is that "async:false" matter? here my code</p>
  
  <pre><code>function ajaxRequestWithNoArguments(url) {
      return $.ajax({
          url: urlForPhp + '/' + url,
          data: '',
          dataType: 'JSON',
          async: false,
          method: 'POST'
      });
  }
  </code></pre>