v1.0
    done:
    1.create member and insert into DB.(2013/6/25)
    2.catch exception detaily.
    undone:
    1.validate user input by JavaScript.
    2.validate user data in create_check.jsp.(2013/6/26)
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.