Splashpage

I`ve made a splashpage and its working fine but need some help with the code !

I need that when on clicking the "join" or "Login" button it should pop up like it happens over normal boonex site ,

On mine I`ve used "join.php" and member.php" links so on clicking these buttons it opens the page and not the popup.

Hello,
Can anybody help me?? 

I will see if I can find some time to take a look.

 I`m having very high hopes from you !