HTML, PDF, TXT, DOC, and GOOGLE experts, HELP!

[L.C.E.C.]

I've found an example of what I want... only problem is, I don't remember much from webmastering... I don't know if this is JavaScript or HTML...

If someone could tell me how to use this, it would be very helpful...

http://www.bitrepository.com/web-programming/php/highlight-words-in-a-text.html