Runescape requirements?

[Charles]

My computer has gone through a phase of giving up and...dying. So I got it all fixed n' everything, but I was loading up Runescape today and it wouldn't load to the login bit. A small rectangular shape was in the top left corner, with 3 little shapes inside it.
What does it mean, do I have to download something?
+rep for help...:)

[Chaz]

download shockwave ;)

[Victimized]

Java maybe?

[Charles]

Ahh, okay. Well i'll get them downloading then. Thanks :)

[Chaz]

be careful what you download!

[Sqaz]

Make sure you have runescape as trusted, what I'm guessing is when it asked if it's aloud to run the applet it was selected no.