slideToggle: Change the text a second time (open -> close -> open -> close...)

<div id="sidebar_archive_infoline_bottom"><a id="showallnews" href="#">SHOW ALL NEWS</a></div>     
 
 <script>
 $('#newsdiv').hide();
 $('#showallnews').click(function () {
 $('#newsdiv').slideToggle('fast');
 $('#showallnews').text('CLOSE')
 }); </script>
 

The text "SHOW ALL NEWS" changes to "CLOSE" after clicking the first time on it. Now I need a method to change it from "CLOSE" to "SHOW ALL NEWS" and so on...

Best regards!

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