[angvelem]

Проверь сам.

Код:

  Mmo2.text := '';
  if (pos('<span class="online">', YouMessage) > 0) and (pos('</span>', YouMessage) > 0) then
  begin
    YouMessage := StringReplace(YouMessage, '<span class="online">', '', [rfReplaceAll]);
    YouMessage := StringReplace(YouMessage, '</span>', '', [rfReplaceAll]);
    Mmo2.text := YouMessage;
  end;