anchor.diff:      <meta name="viewport" content="width=device-width, initial-scale=1">
   	</head>
   <%
  +
   
     boolean username_validation_error = false;
     boolean duplicate_invite_error = false;
  
positive.code: 
        <% } %>
  
        <% if (Group_utils.has_been_invited(logged_in_user_id, gid)) { %>
          <div>
            You have been invited to join this group.  Click on the button below to confirm joining
          </div>
  
negative.code: 
    }
  
    boolean is_invited = Group_utils.has_been_invited(logged_in_user_id, gid);
    boolean is_a_member = Group_utils.is_member_of_group(logged_in_user_id, gid);
    boolean is_the_group_owner = logged_in_user_id == the_group.owner_id;
  
  
    if (!(is_invited || is_a_member)) {
      response.sendRedirect("general_error.jsp");
      return;
    }
  
  %>
  	<body>
    <img id='my_background' src="img/front_screen.png" onload="xenos_utils.fade_in_background()"/>
  