title: jquery synchron fadeout and fadeto with differnt elements
body: <p>i try to get a solution for following problem.</p>
  
  <p>synchron fadeout and fadeTo with different elements.</p>
  
  <p>the page behavior should be like this
  - page load
  - content hidden
  - menu shown
  - content fadeIn and menu fadeTo opacity 0.0</p>
  
  <p>my snippset of code </p>
  
  <pre>
  $(document).ready(function(){
          $(".content_main").hide();
          $(".content_main").fadeIn(8000);
          $(".header > ul").ajaxSend(function(){this.fadeTo("8000", 0.0)});
  });
  </pre>
  
  <p>but this isn't synchron, any hint ??</p>