How to cut prefix from a string?

Hi folks,

I have the following parameter setting:
export ADMIN_HOST_NAME=http://hostname.com

I want to define a new parameter,ADMIN_HOST_NAME_NEW,which based on $ADMIN_HOST_NAME but I need to remove the prefix "http://".
The requested result for $ADMIN_HOST_NAME_NEW is hostname.com

How to cut this prefix from the parameter?

Thanks in advance,
Nir

#!/bin/ksh

a='http://hostname.com'
b="${a##http://}"
echo "${b}"

Hi vgersh99,

Thanks a lot!
It works perfect!

Regards,
Nir