Hide text when div is visible

Hide text when div is visible

Hi all,

I got this function:
  1. <script type="text/javascript">
  2. $(document).ready(function(){
  3.         $(".slidingDiv").hide();
  4. $("#testshow").show();
  5.   
  6.         $('#testshow').click(function(){
  7.         $(".slidingDiv").slideToggle();
  8.     });
  9. });
  10. </script>
and:
  1. <a href="#" class="show_hide" id="testshow">Show</a>
  2.       <div class="slidingDiv"> Div is open <a href="#" id="testhide">hide</a></div>
How can i hide the text "Show" from the a href when the slidingDiv is open?

Thanks!
Bart