<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
<div id="addSubjectForm" align="center">
<form action="libraryaddservlet?method=book" method="post" onsubmit="return check()">
<tr>
<h2>请输入教师信息</h2>
</tr>
<table align="center">
<tr>
<td>图书编号：</td>
<td>
<input pattern="[a-zA-Z0-9]{8,8}" name="bookID" >（输入八位学号）
</td>
</tr>
<tr>
<td>图书书名：</td>
<td>
<input type="text" name="bookname" >
</td>
</tr>
<tr>
<td>作者姓名：</td>
<td>
<input type="text" name="author">
</td>
</tr>
<tr>
<td>出版社名称：</td>
<td>
<input type="text" name="banname">
</td>
</tr>
<tr>
<td>可借阅数量：</td>
<td>
<input type="text" name="booknum">
</td>
</tr>
<tr>
<td colspan="2"><div align="center">
<input type="submit" value="录入信息">
</div>
</td>
</tr>
</form>
</div>
</body>
<script type="text/javascript">
function check() //封装一个<body>中做成点击事件的函数
{
if($('input:radio[name="bookname"]:checked').val()==null) {
alert('学生姓名不能为空！');
document.getElementById('bookname').focus();
return false;
}
if($('input:radio[name="bookID"]:checked').val()==null) {
alert('学生学号不能为空！');
document.getElementById('bookID').focus();
return false;
}
if($('input:radio[name="author"]:checked').val()==null) {
alert('作者不能为空！');
document.getElementById('author').focus();
return false;
}
if(document.getElementById('banname').value=='') {
alert('出版社名称不能为空！');
document.getElementById('banname').focus();
return false;
}
if(document.getElementById('booknum').value=='') {
alert('可借阅数量不能为空！');
document.getElementById('booknum').focus();
return false;
}
}
</script>
</html>