Thanks for previous answers to my questions. Another question.
I have a domain name, say www.abc.com, with one hosting company(refer it as HA later).
Now I get another company (refer it as HB later) to design a new website for me for www.abc.com. But this new company needs to host www.abc.com for me to give me the content management system to work on. I hesitate to transfer the domain management from HA to HB because I have set up a few things with HA. I don't want to reset up again. So I suggest that when people type www.abc.com, it can redirect to another address, which mean it will redirect to another domain.
But HB says that I don't need to get another domain. People can just type "WWW.ABC.COM", and then a new website will appear. I can still use all my original set up.
My question is how this can be done.