add base code
v1.0
done:
	1.create member and insert into DB.(2013/6/25)
	2.catch exception detaily.
	undone:
	1.validate user input by JavaScript.(2013/6/25)
	2.validate user data in create_check.jsp.
v1.1
done:
	1.create member and insert into DB.(2013/06/25)
	2.catch exception detaily.
	3.enquire member by muti contition.(2013/06/26)
undone:
	1.validate user input in create.jsp by JavaScript.(2013/06/25)
	2.validate user data in create_check.jsp.
	3.validate user input in enquire.jsp by JavaScript.(2013/06/26)
	4.validate user data in enquire_check.jsp.