http://faq.tsukaeru.net/node/893
http://nakawake.net/?p=643
http://svn.ec-cube.net/open_trac/ticket/422
http://xoops.ec-cube.net/modules/newbb/viewtopic.php?topic_id=2199&forum=11
http://xoops.ec-cube.net/modules/newbb/viewtopic.php?topic_id=2044&forum=2&viewmode=flat&order=ASC&start=0
http://xoops.ec-cube.net/modules/newbb/viewtopic.php?topic_id=487&forum=2&viewmode=flat&order=ASC&start=0
http://webdirector.livedoor.biz/archives/51877055.html