Traversal from frame to frameset

Traversal from frame to frameset

I'm trying to figure out how to traverse from a frame (basically a header region) to the frameset, to alter the height of said frameset.
In example.php below, I want to change the rows value of <frameset> from an event trigger in a script in example-header.php
  2. <frameset rows="49px,*" frameborder="NO" border="0" framespacing="0">
  3.   <frame src="example-header.php?url=<?php print "$url"; ?>" id="header" name="frame" scrolling="NO" noresize>
  4.   <frame src="<?php print "$url"; ?>" id="main" name="main">
  5. </frameset>
Here's my script in example-header.php

  2.  <script>
  3.  // Show and Hide Community Nav Bar
  4.  $(document).ready(function() {
  5.    $('.hide-toolbar span').click(function() {
  6.      $(this).parent('.hide-toolbar').hide('fast');
  7.      $('.show-toolbar').show('fast');
  8.      $('#community-nav').slideUp('800');
  9.      // HERE'S WHERE I'M STUMPED $('frameset', FRAMETRAVERSAL).attr('rows', '4px, *');
  10.     });
  11.     // HIDE FUNCTION SIMILAR
  12.  });
  13.  </script>

  15. </head>
  16. <body>

  18. <div class="hide-toolbar"><span>HIDE&nbsp;&nbsp;X</span></div>
  19. ...
Any help would be much appreciated.