1 <!-- 功能是一开始就选中username的框 -->
 2 <script type="text/javascript">
 3     setTimeout(function() {
 4                 try{
 5                       var z=document.getElementById('username');
 6                       z.focus();
 7                       z.select();
 8                   } catch(e){}
 9        },1);
10 </script>   

 1 <form id="login_form" name="login_form" action="/Browser/LoginServlet" method="post">
 2       <label>User Name</label>
 3       　　<input id="username" maxlength="64" name="userID" class="text" type="text" />
 4          <div id="username_errors" class="form_errors"></div>
 5
 6       <label>Password</label>
 7          <input id="password" maxlength="64" name="password" class="text" type="password" />
 8
 9       <input name="login" value="Sign in" class="super-emphasize" type="submit" />
10 </form>

1 response.sendRedirect(request.getContextPath() + "/login.jsp?Error=1&useridNotFound!");

 1 <script type="text/javascript">
 2     //<![CDATA[
 3     function request(paras) {
 4         var url = location.href;
 5         var paraString = url.substring(url.indexOf("?") + 1, url.length).split("&");
 6         var paraObj = {};
 7         for (i = 0; j = paraString[i]; i++){
 8             paraObj[j.substring(0,j.indexOf("="))] = j.substring(j.indexOf("=")+1,j.length);
 9         }
10         var returnValue = paraObj[paras];
11         if (typeof(returnValue) == "undefined"){
12             return "";
13         } else {
14             return returnValue;
15         }
16     }
17     var userID = request("userID");
18     /* =========================================================================
19     // 用户已经登录，那么显示用户名和退出
20     ========================================================================= */
21     if (userID != "") {
22         document.getElementById('silo_sign_in').href = null;    // 登录-->用户名
23         document.getElementById('silo_sign_in').innerHTML = userID;
24         document.getElementById('silo_get_started').href = "/Browser/LogoutServlet";    // 注册-->退出
25         document.getElementById('silo_get_started').innerHTML = "退出";
26         document.getElementById('dataStatistic').href = "dataStatistic.jsp?userID="+userID;
27         document.getElementById('dataManager').href = "dataManager.jsp?userID="+userID;
28     } else {
29         document.getElementById('dataStatistic').href = "login.jsp";    // dataStatistic
30         document.getElementById('dataManager').href = "login.jsp";    // dataManager
31     }
32     //]]>
33 </script>