为什么我页面用一个Founction就不行

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<%@ page language="java" contentType="text/html; charset=GBK"
pageEncoding="GBK"%>
<%@ taglib uri="/WEB-INF/struts-html.tld" prefix="html"%>
<%@ page import="java.util.Vector"%>
<%@ page import="java.util.Date"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=GBK">
<title>Insert title here</title>
<%String path = request.getContextPath()
  + "/student/actionExample.do";
  Vector<String> names = new Vector<String>();
  Vector<String> addresss = new Vector<String>();
  Vector<Date> brithday = new Vector<Date>();
  Vector<String> sexid = new Vector<String>();
  Vector<Integer> studentid = new Vector<Integer>();
  String sex = "";
  Object object = request.getAttribute("isSubmit");
  boolean isSubmit = false;    if (object == null) {
isSubmit = false;
} else {  isSubmit = (Boolean) object;
  names = (Vector<String>) request.getAttribute("names");
  addresss = (Vector<String>) request.getAttribute("addresss");
  brithday = (Vector<Date>) request.getAttribute("brithday");
  sexid = (Vector<String>) request.getAttribute("sexid");
  studentid = (Vector<Integer>) request.getAttribute("studentid");
  }
   %>
<script language="javascript">
function test()
{
var _value = document.getElementById("studentName").value;
if(_value=="")
{
alert("请输入正确的学生名");
}
}
</script>
<script language="javascript">
function ok()
{
    document.all.show.style.display='block';
    var _id=document.getElementById("check");
    var _name=document.getElementById("name");
    var _brithday=document.getElementById("brithday");
    var _sexid=document.getElementById("sexid");
    var _address=document.getElementById("address");
}
</script>
</head><body>
<form action="<%=path%>" method="post">
<table>
<tr>
<td>学生名:<input type="text" id="studentName" name="studentname" /></td>
</tr>
<tr>
<table>
               <tr>
               <td><input type="submit" id="sub" value="查询" onclick="test();" /></td>
               <td><input type="button" id="ok" value="修改" onclick="ok();" /></td>
               <td><span id="show" style="display:none"> <input type="button"
id="update" value="保存" onClick="update();" /></span></td>
      </tr>
</table>
         </td>
         </tr>
<tr>
<td>        学生ID</td>
<td>        学生姓名</td>
<td>        出生日期</td>
<td>        性别</td>
<td>        学生住址</td>
</tr>
<%for (int i = 0; i < names.size(); i++) {%>
<tr>
<td><div id="id"><input type="checkbox" name="check" id="check" />
      <%=studentid.get(i)%    ></div></td>
<td><divid="name">        <%=names.get(i)%></div></td>
<td><divid="brithday">        <%=brithday.get(i)%></div></td>
<td><divid="sexid">        <%=sexid.get(i)%></div></td>
<td><divid="address">        <%=addresss.get(i)%></div></td>
<%}%>
</tr>
</table>
</form>
</body>
</html>我的完整是这样的,可点了修改还是不会出现保存的
ok方法名有问题
换一个，用showUpdate()就可以了
发现到了,原来id名不能和onclick后面同名,谢谢ranranhu