What script is used to generate fake emails?

I need a lot of email generated the same way this 2 pages generate
The problem with this sites is that sometimes are down and have to wait for webmaster to fix the problem. I want to install the script( if anyone knows what they are using) on my server so .This sites basically generate one new email every time you open the page and automated copy the generated email in the clipboard.

No one?I really need this