Need help

Hello friends. I am a newbie to php. I am trying to connect to mysql with php. I have a website called www.abcresources.com The mysql database set up by the hosting company is called "abc_resources.com" I have a table called "addressbook" I log in into the admin page with my username as "user" and password as "12345". After that I do not use any username and password. So I am not sure if I need a username and password in the connection string. I have this line to connect : if (!($link=mysql_connect($hostname,$username,$password))){ displayerr(sprintf("internal error %d:%s\n", mysql_errno(), mysql_error())); What should $hostname, $username and $password be in the globals.php file? Thanks for help. Denis