http://os.51cto.com/art/201003/186930.htm
http://chenbin.blog.51cto.com/945033/343796/
http://en.wikipedia.org/wiki/POST_(HTTP)
http://www.w3.org/TR/html401/interact/forms.html
http://www.w3.org/TR/html401/interact/forms.html#submit-format
http://www.w3schools.com/tags/att_form_action.asp
http://www.htmlcodetutorial.com/forms/index_famsupp_6.html
http://www.nowamagic.net/webdesign/webdesign_NetworkCrawler.php
http://www.nowamagic.net/webdesign/webdesign_ACreative404Page.php
http://www.nowamagic.net/webdesign/webdesign_FormAndHttpGetPost.php