验证字符串为汉字的正则表达式为
var regExpression = /[\u4E00-\u9FA5]/;
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>验证字符串是否为汉字</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
<script language="javascript">
function checkRealName(){
var realName = document.getElementById("realName");
var regExpression = /[\u4E00-\u9FA5]/;
if(!regExpression.test(realName.value)){
alert("您输入的真实姓名不正确 ，必须为汉字！");
realName.focus();
return;
}
document.getElementById("myform").submit();
}
</script>
<style type="text/css">
table{
font-size: 13px;
font-family: 楷体;
color:navy;
}
input{
font-size: 13px;
font-family: 楷体;
color:navy;
}
font{
font-size: 12px;
font-family: 楷体;
color:orangered;
}
.style1{
width: 500;
height: 260;
}
</style>
</head>
<body>
<fieldset class="style1"><legend>用户注册</legend>
<form action="" id="myform">
<table align="center">
<tr>
<td>用户名：</td>
<td>
<input type="text" id="name">
</td>
</tr>
<tr>
<td>密码：</td>
<td>
<input type="password" id="pwd">
</td>
</tr>
<tr>
<td>确认密码：</td>
<td>
<input type="password" id="pwd1">
</td>
</tr>
<tr>
<td> 性别：</td>
<td>
<input type="radio" name="sex" id="man" value="m" />男
<input type="radio" name="sex" id="woman" value="f" />女
</td>
</tr>
<tr>
<td>年龄：</td>
<td>
<input type="text" id="age">
</td>
</tr>
<tr>
<td>真实姓名：</td>
<td>
<input type="text" id="realName">
</td>
</tr>
<tr>
<td>E-mail：</td>
<td>
<input type="text" id="email">
</td>
</tr>
<tr>
<td align="center" colspan="2">
<input type="button" value="提 交" "checkRealName()">
</td>
</tr>
</table>
</form>
</fieldset>
</body>
</html>
