$("iframe").contents().width() throws exception

[telega]

Code $("iframe").contents().width() throws exception in Opera & Firefox and returns NaN in IE.

<script src="jquery.js"></script>
<script>
  $(document).ready(function() {
    try {
      var width = $("iframe").contents().width();
      alert(width);
    }
    catch(e) { alert(e); }
  });
</script>

<iframe></iframe>

[rwaldron]

Tested in all offending browsers listed above - this issue no longer exists:

 http://jsfiddle.net/rwaldron/hqA8u/