how to pass non-english characters in the address line

[eluser]emperius[/eluser]
I need to pass in the addres line cyrilyc letters. Is there any function that allows to encode and decode letters?

I tried to use ord and chr but I didn't get any result

[eluser]pistolPete[/eluser]
Have a look at http://ellislab.com/forums/viewthread/106225/.