you don't really understand it, do you.
its not interactive stuff that doesnt work, just google or what ever doesn't cache plug ins such as java and flash.
if you arent a 4th grader trying to get on Neopets, you might just want to try a proxy. (if right now you are thinking "well proxys are blocked at my school" then please lol at yourself, web proxys are the worse thing since unsliced loafs of bread)
get Firefox+some real proxys (tons of tutorials on the webz) and they should work with plug ins, but almost all free proxys are too slow to play runescape, which is the reason 90% of you looked here.
oh, btw dont take this offensively, i wouldn't post here if i wasn't trying to help you help other people, it would take forever to explain how to find good proxys and setting it up, so im just going to tell you about it and you can write the guide if you want (i suck at guides)
but if you truly do need help, feel free to pm me.