The best way to know whether links are dead or alive is, you need to use firefox browser; then you download add-on "greasemonkey" and add script "rapidshare link checker and universal link checker" and restart urfirefox.
Follow the steps below:
Rapidshare and UniversalAutomatic Link Checker.
1. Download/upgrade to lastest Firefox
Code:
http://en-us.www.mozilla.com/en-US/]Mozilla | Firefox web browser & Thunderbird email client
2. Install Greasemonkey from add-on link below:
Code:
https://addons.mozilla.org/en-US/firefox/addon/748
3. Restart Firefox.
4. Then download user script below (or click "Install this script" at top right hand corner):
Code:
http://userscripts.org/scripts/show/9467]Rapidshare Links Checker for Greasemonkey
Code:
http://userscripts.org/scripts/show/24953]Universal Links Checker for Greasemonkey
5. Restart Firefox.
Now everytime you open any page containing rapidshare, filefactory, megaupload, easy-share, megashare and a few other links, the script will check automatically whether they are still alive or valid.