404 page desing and emplement on site

this is very simple for create your own custom 404 page design

just you need a page design focus on error information and then follow this instruction

1. FTP to your host. Look for a file named .htaccess. If you find it, download the file to your home computer for editing. If the file is not there, you'll just have to create one.
2. If you found it, use your text editor and open it, or if you don't have a .htaccess file, open up a blank file. Type the following on the first line of the file (all one line):
   ErrorDocument 404 http://www.yourdomainname.com/404page.htm
   Replace yourdomainname.com with your domaim name.
3. Note: Window users may not be able to create a file named .htaccess. Instead, create a file named htaccess.txt, FTP it to your site, and then rename it .htaccess.
4. FTP your 404page.htm (404page.html) and .htaccess file to your Website.
5. Test your 404page.htm (404page.html) and e-mail link to you.