Ok, I am new to this, and would like some clarification on how to properly set this up.

The problem is on an online store, sometimes the URL will redirect to "domain.com" as oppose to "www.domain.com"

The problem is that the cart automatically clears out when this happens. So if somebody is in the middle of shopping, if this happens...they have to start over.

So, I understand that I need to do this with .htaccess?

Do I just create a new notepad file, and name it .htaccess?

Please help,
Thanks
Joe

So, I understand that I need to do this with .htaccess?

If your site is hosted on Apache, yes.

HOWEVER:

Your title says ISAPI rewrite which is for IIS.

So....


... which are we going for?