[1] <http://www.nttdocomo.co.jp/service/imode/make/content/browser/html/tag/tagshitei.html>
[2] <http://www.nttdocomo.co.jp/service/imode/make/content/browser/html/tag/iswf.html>
[3] <http://www.nttdocomo.co.jp/service/imode/make/content/browser/browser2/tag/a.html#p08>