I am using a blog. I want to make a small script "Report this problem". Becuase whenever the visitors comes from google or from anywhere if they find 404 page than they have a option to report this page. When user click a link report this page after few second this dialog box opens and say "Thank you for reporting". I hope you understand what i mean. Sorry for bad english
well, if your host allows you to use a web form mailer, you could write a small php script that you can place on your 404 page that would automatically email you when a 404 is loaded. you could have it send you the URL in the body of the email, then after sending auto-redirect the user to your home page I'm not the best at website programming theory, but I would also have the page create an entry to a mysql table, so that it could also check to see if you've already been emailed about a specific page or not, just to avoid getting a thousand emails about 1 page (if you happen to have that kind of traffic)