if (document.images) {
        homebuttonup       = new Image();
        homebuttonup.src   = "images/home.png" ;
        homebuttondown     = new Image() ;
        homebuttondown.src = "images/home_over.png" ;

        aboutbuttonup       = new Image();
        aboutbuttonup.src   = "images/about.png" ;
        aboutbuttondown     = new Image() ;
        aboutbuttondown.src = "images/about_over.png" ;
        
        forumsbuttonup                        = new Image();
        forumsbuttonup.src            = "images/forums.png" ;
        forumsbuttondown              = new Image() ;
        forumsbuttondown.src  = "images/forums_over.png" ;
        
        downloadsbuttonup                     = new Image();
        downloadsbuttonup.src         = "images/downloads.png" ;
        downloadsbuttondown           = new Image() ;
        downloadsbuttondown.src       = "images/downloads_over.png" ;
        
        membersbuttonup                       = new Image();
        membersbuttonup.src           = "images/members.png" ;
        membersbuttondown             = new Image() ;
        membersbuttondown.src = "images/members_over.png" ;
        
        profilebuttonup                       = new Image();
        profilebuttonup.src           = "images/profile.png" ;
        profilebuttondown             = new Image() ;
        profilebuttondown.src = "images/profile_over.png" ;

        logoutbuttonup                       = new Image();
        logoutbuttonup.src           = "images/logout.png" ;
        logoutbuttondown             = new Image() ;
        logoutbuttondown.src = "images/logout_over.png" ;
        
        }
        function buttondown( buttonname )
        {
        if (document.images) {
        document[ buttonname ].src = eval( buttonname + "down.src" );
        }
        }
        function buttonup ( buttonname )
        {
        if (document.images) {
        document[ buttonname ].src = eval( buttonname + "up.src" );
        }
        }