turn wireless off before suspend

[Stojcsics Péter <stotox gmail com>]

Hi!

I am using wireless with ndiswrapper and networkmanager. However i need 
to unload ndiswrapper module before suspend. The problem is when i try 
to unload ndiswrapper with modprobe -r or rmmod the whole system 
freezes. However if i turn wireless of by right clicking in network 
manager applet and i click disable wireless, then i can unload the 
module without freeze. I want to make thing automatic, so i can edit 
prepare.sh (starts before suspend), but i dont know the command to turn 
wireless off. Anyone can help me? ifconfig eth1 down or 
/etc/init.d/networking stop dont works. I am using ubuntu 2.6.22-14-generic

Thx for help in advance.