Not changing url when server.transfer

[lunargirrl]

This might be quite simple, but I cant find out.
I want to not change my url when server.transfer.
e.G.
my url:

http://www.mydomain.com

when i login it become:

http://www.mydomain.com/default.aspx

when i move to another page:

http://www.mydomain.com/pages/page1.aspx

i would like to have always the

http://www.mydomain.com

displayed in my browser url.

Is that possible?
TIA,
Gis.

 

[BoulderBum]

It will, at first, appear to be the same URL, but if the user refreshes, it will appear.

I suppose you can use frames to mask the URL, but it would still be visible in the source.