Script Error : part deux

Same story - havn't got a clue what's going on in this script
   document is not an object
It only happens when you mouseover the Support Forum link in the menubar
take a look see
http://www.thenetzone.co.uk/main.shtml

Here's the code from the offending bit of script - line no. given in IE5
I realise it could well be in another part of the script (mouseovers you
see) but for the sake of bandwidth, ill refrain from posting my whole site
code on this list.

function changeImages() {
  if (document.images) {
    for (var i=0; i<changeImages.arguments.length; i+=2) {
      document[changeImages.arguments[i]].src =
eval(changeImages.arguments[i+1] + ".src");

document[...] is not an object???

Any ideas - as this is of no use to anyone else on the list, you may as well
reply personally.

Thanks

Thankyou

Ben Bradley UK
Creative Director
-------------------------------------------

The Net Zone Web Design And Hosting Services:
INTERNET: http://www.thenetzone.co.uk
EMAIL: ben(at)thenetzone.co.uk
eFAX: 001 801 409 5638
PHONE/FAX: 070 21 16 66 50

HTML: hwg-basics mailing list archives, maintained by Webmasters @ IWA