chatbox chat block thing help

[themarker0]

what do i need to change in the code for my site?

i am using a free E3b.org hosting
the link is themarker0.e3b.org

<iframe height=550 width=100% marginheight=0 marginwidth=0 scrolling=no frameBorder=0 src="http://g4l.blackc0re.info/forums/chat/flashchat.php"></iframe>
what do i change in this


//[Chat] button -zero's custom edit
            if ($context['allow_memberlist'])
      echo ($current_action == 'chat' || $context['browser']['is_ie4']) ? '' : '' , '
            <div class="maintab_' , $current_action == 'chat' ? 'active_back' : 'back' , '">
               <a href="', $scripturl, '?action=chat">' , Chat , '</a>
            </div>' , $current_action == 'chat' ? '<div class="seperator"><!--no content--></div>' : '<div class="seperator"><!--no content--></div>'