http://support.microsoft.com/kb/311568/zh-cn
   <authentication mode="Forms">
      <forms loginUrl="login.aspx" name="nameOfAuthCookie" timeout="60" path="/" >
         <credentials passwordFormat="Clear">
            <user name="username" password="password"/>
         </credentials>
      </forms>
   </authentication>
   <authorization>
<deny users="?" />
   </authorization>怎么把用户名和密码存储在数据库里,然后通过数据读出用户登陆信息啊?