[thelist] Javascript + CSS Magic to "reveal" form field

[Jono]

I have moved on to what appears to be a better option, problem is that this
JS is supposed to be used on a link.  I need this to work on a checkbox.
Below is the code I am trying, and below that is my code, and the errors I
am getting:

[quote: code I am trying to use]

Try this function - best ive found and its good cross browser compatibility:

<!-- in HEAD of document -->
<script language="javascript">
<!--
var state = 'hidden';

function showhide(layer_ref) {

if (state == 'visible') {
state = 'hidden';
}
else {
state = 'visible';
}
if (document.all) { //IS IE 4 or 5 (or 6 beta)
eval( "document.all." + layer_ref + ".style.visibility = state");
}
if (document.layers) { //IS NETSCAPE 4 or below
document.layers[layer_ref].visibility = state;
}
if (document.getElementById && !document.all) {
maxwell_smart = document.getElementById(layer_ref);
maxwell_smart.style.visibility = state;
}
}
//-->
</script>


<!-- in BODY of document -->

<div id="agent99" style="position:absolute; top:103px; left:153px;
visibility:hidden;">
your stuff to show here
</div>

<!-- CLICK LINK TO SHOW LAYER -->

<a href="javascript://" onclick="showhide('agent99');">click me</a>
[/quote]

[snip of my code]

<tr> 
<td>&nbsp;</td>
<td>&nbsp;</td>
<!-- This checkbox should show/hide the div "aggent99" -->
<td><input name="addName" type="checkbox" id="addName" value="addName"
"onclick="showhide('agent99');"><label for="addName">[Add your
Name]</label></td>
<td>&nbsp;</td>
</tr>


<div id="agent99" style="visibility: hidden;">
  <tr> 
    <td>&nbsp;</td>
    <td><label for="Name">Name</label></td>
    <td><input name="Name" type="text" value="" id="Name" size="32"></td>
    <td>&nbsp;</td>
  </tr>
</div>

[/snip]

This is the error that Firefox is reporting:

Error: uncaught exception: [Exception... "Component returned failure code:
0x80520001 (NS_ERROR_FILE_UNRECOGNIZED_PATH) [nsILocalFile.initWithPath]"
nsresult: "0x80520001 (NS_ERROR_FILE_UNRECOGNIZED_PATH)"  location: "JS
frame :: chrome://browser/content/search.xml :: initialize :: line 31"
data: no]

Can someone please help me to get this working?