I would like to place error pages like the one on SitePoint for broken links - 404 on my site.

Is there somewhere I could find the code for this?? Is this a regular HTML page with a form on it??

Also, I cannot remember the questions which were asked when I happen to go by one of them. Would appreciate someone at SitePoint reminding me what the questions were and/or information requested on the error (broken link) page.

I also received a thankyou E-mail after the link was fixed. I thought that was pretty cool.