I may overstepping my bound for the time being, since I just barely signed into the Ask The Expert forum. But let me give you my 2 cents because I do webpage programming and a techno-geek.
1. The page you've posted:
http://www.sciencebuddies.org/mentoring ... ?from=Home
This page contains a java window near the bottom of the page that allows you to do a calculation within itself.
2. If you see a window/box at the bottom of the webpage, that means you have java installed. If not, you can download the java software at:
- If you have Windows, scroll down on the page and hit the Download button next to the text "Java Runtime Environment (JRE) 6 Update 3".
If you can visit this website and post your thoughts, that means your system have the sufficient processing power and memory to run the java software. The question would be, do you have enough hard drive space to install the free java software. That, you have to ask your parents if you're at home, or your teacher if you're in class.
Please, let us know what you found from talking to your parents or teacher about the computer you're using.