SQL & PL/SQL

Hi,

I'm working on a project with PL/SQL, here is one procedure is for users to login, those users are oracle users, they have oracle accounts. We want them login to my page with the oracle account username and password. Since there is no way we can validate the password, so were thinking use the username and password that user entered to connect to the database, if connected then password is valid goto next step, otherwise return error message.

My question was that if there is a way to do the connecting with PL/SQL. Please help.