效果图：
代码：
源代码：
<script type="text/javascript">
function check(){
var xm = document.getElementById("xm").value;
if(xm == null || xm == ''){
alert("用户名不能为空");
return false;
}
return true;
}
</script>
</head>
<body>
<form action="${pageContext.request.contextPath }/insertStuServlet" method="get" οnsubmit="return check()">
姓名<input name="xm" id="xm" type="text" /><br />
性别<input name="xb" type="radio" value="男" />男
<input name="xb" type="radio" value="女" />女<br />
出生日期<input name="csrq" type="text" class="Wdate" onClick="WdatePicker()" /><br />
分数<input name="fs"type="text" /><br />
<input name="" type="submit" value="提交" />
</form>
![Elasticsearch Reference [6.7] » Modules » Network Settings](https://www.elastic.co/guide/en/elasticsearch/reference/current/images/icons/tip.png){kind=icon}
