Iptables redirect problem

[compaq]

Hi, I'm trying to redirect to another ip when I want to go to like google.com.
Like when I click on the web browser and to to google.com, it will redirect to my web page
So far I've tryed this

modprobe iptable_nat
echo 1 > /proc/sys/net/ipv4/ip_forward
iptables -t nat -A POSTROUTING -o rausb0 -j MASQUERADE
iptables -A PREROUTING -i rausb0 -t nat -p tcp -d www.google.com -j DNAT --to 192.168.5.103

I run this on my computer(compaq) then when I open a web browser and go to google, it displays the google homepage.

Any ideas, thanks

[compaq]

Does any one have any ideas.