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先看下面的 JSF 页面:
<%...@ page language="java" pageEncoding="UTF-8"%> <%...@ taglib uri="http://java.sun.com/jsf/html" prefix="h"%> <%...@ taglib uri="http://java.sun.com/jsf/core" prefix="f"%> <html> <head> <title>My JSF 'login.jsp' starting page</title> <script type="text/javascript">... function isEmpty() ...{ var username = document.getElementById("formLogin:txtUsername").value; var password = document.getElementById("formLogin:txtPassword").value; if(username == "") ...{ alert("给老子输用户名!"); document.getElementById("formLogin:txtUsername").focus(); return false; } if(password == "") ...{ alert("不输密码你登录个铲铲!"); document.getElementById("formLogin:txtPassword").focus(); return false; } } </script> </head> <body> <center> <f:view> <h:form id="formLogin"> <div id="input"> <h:outputLabel value="用户名:" /> <h:inputText value="#{LoginManager.username}" id="txtUsername" styleClass="formText" /> <br> <h:outputLabel value="密码:" /> <h:inputSecret value="#{LoginManager.password}" id="txtPassword" styleClass="formText" /> </div>
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