Why Does This Work In FF, But Not In IE? Please Help

The 'Pick A Color' javascript popup windows on the page below display fine in Firefox, but in Internet Explorer, the popup window is blank.

See Here

Does anyone have any idea what's causing this (and how to fix it?)

 

<input name="adbackcolor" type="text" size="8" />
           
          
<a href="javascript:TCP.popup(document.forms['form1'].elements['adbackcolor'])">

Code (markup):

try to add the id to the input field

<input name="adbackcolor" id="adbackcolor" type="text" size="8" />
            </label>
          <a href="javascript:TCP.popup(document.forms['form1'].elements['adbackcolor'])">

Code (markup):

 

Thanks for the tip. Will try it.