📄 login.jsp
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<%@ page language="java" pageEncoding="UTF-8"%>
<html>
<head>
<script type='text/javascript' src='<%=request.getContextPath()%>/dwr/engine.js'> </script>
<script type='text/javascript' src='<%=request.getContextPath()%>/dwr/util.js'> </script>
<script type='text/javascript' src='<%=request.getContextPath()%>/dwr/interface/myuserDAO.js'> </script>
<script type='text/javascript' src='<%=request.getContextPath()%>/dwr/interface/myuser.js'> </script>
<!-- 在dwr.xml中定义了名为Demo的JavaScript -->
<script type="text/javascript">
function check()
{
var name = dwr.util.getValue("username");
myuser = {username:name};
myuserDAO.checkName
(myuser,function(data)
{
if(data=="用户名有效")
{
document.form1.password.focus();
}
else
{
document.form1.username.value="";
document.form1.username.focus();
}
dwr.util.setValue("nameMessage" ,data);
}
);
}
</script>
</head>
<body>
<form action="login.do?dispatch=login" method="post" name="form1">
user name :<input type="text" name="username" onblur="check();"/>
<font color="red"><span id="nameMessage" style="width:200px ; height:20px;"></span></font>
<br/>
password : <input type="password" name="password" /> <br/>
<input type="submit" value="submit" />
<input type="reset" value="reset" />
</form>
</body>
</html>
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