Set checkbox status - works in IE but not FF

At the top of a page I'm displaying a check box thus:
>
<input type='checkbox' name='ckbx1' onClick='saveStatus("ckbx1");'>ABC
>
I then execute the following to set the check box to whatever it was
the last time it was changed:
>
<script type='text/javascript'>
document.getElementById('ckbx1').checked = getCookie('ckbx1');
</script>
>
This seems to work ok in IE6 but in Firefox a "...has no properties"
error is generated when the script executes. The same error is
generated when I click on the check box.
>
What I'm doing wrong ?

>Hi,
>
>What is wrong is simply that you use getElementById(), but didn't assign an
>id to the checkbox.
>You only named it. Names are for formelements (name/value-pairs) so the
>receiving script can use them.
>ids are for JS.
>
>Solution: add the id to the box.
>
>The reason IE does it 'right' is because IE does it wrong, and confuses name
>with id.
>
>Regards,
>Erwin Moller