I use yahoo for hosting & use Yahoo sitebuilder,is there a way to put usernames and passwords for my clients?

I'd like for my clients to be able to have a username and password for my site so they can access info that we've updated for their account & see account info & book work w/ us. I own a pet service business and it would be nice to have this feature on our site. Is there a way to do it for free or cheap keeping in mind that I use Yahoo Sitebuilder to publish my website? Please help!!

I do not think that yahoo site builder will be any help here. If you want some user log-in interface to your site you will have to hold all the users in a data base and create a log-in page with a form usually using one of three options. PHP cheap and easy but I am not sure yahoo servers are PHP compatible. Java Script easy and fast but generally speaking not a very secure way. C# or ASP.NET a little more expensive and hard to set up the best and most secure solution and I am not sure yahoo have ASP enabled at their servers either. So really it depends on yahoo which way you should choose to create the user log-in.