does any1 know how to

1)on an administrator account on my crappy iBook,
2)on safari (or firefox, if need be)
3)prevent access to certain websites.

my sis keeps using my laptop, which irritates me.
so being the mean spirited son of a bitch i am,
i'd like to block access to some websites,

namely
1) xiaxue's blog
2) dawnyang's blog
3) some other blogs and stuff she reads.
4) and friendster

yes, i'm a selfish bastard.
help me, please?

the toxic waltz- exodus.

Here's a new dance craze that's sweeping the nation.
It's called the Toxic Waltz, and it's causing devastation.

You're jumping up and down like a psycho circus clown
Slamming with waltzers All the way around

You get caught up in the whip, Thrown into a flip
You aim for someone's head To stain the floor red

Give someone a kick To prove you're truly sick.
Bounce back from some blows and blood runs out your nose

Flailing round and round, and you're injury bound
Waltz it up!
The pit is it!
You can take your chance On this rough new dance
If you dare!
To dive in!
There are some that try But they don't survive
They don't hit!
'cause they're wimps!
And this exercise helps you brutalize
With us!
EXODUS!