Can't Find Script Anymore

I am trying to add a box to my web page that the user can type in a KEYWORD and be directed to one of my pages based on the keyword. Example if they enter "tom" they will be dierected to www.tomboy.com or if they enter "apple" they are directed to www.apples.com. I downloaded a script a while back from the page but can not find it now. The script had a section where you typed out the keyword and where to redirect. Example
if keyword = "Tom" then goto "www.tomboy.com
if keyword = "apple then goto "www.apples.com
Etc.

Any help would be greatly appreciated.

Hmm I can say there definitely was never such a script on DD. By typing in a keyword, do you mean into a text box, or the actual browser location bar?