<%@ page language="java" import="java.util.*" pageEncoding="GBK"%>
<%
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>      
     
<SCRIPT LANGUAGE="JavaScript">      
function checkAll(e,itemName){    //全选函数 e为全选对象,itemName 为子name      
 var aa=document.getElementsByName(itemName);      
 for(var i=0;i<aa.length;i++){      
  aa[i].checked=e.checked;      
 }      
}      
     
function checkItem(e,allName){   //当选取或取消选取没一个复选框时调用的函数       
 var all=document.getElementById(allName); //全选框对象      
 if(!e.checked){      //如果是取消选取那么全选框就取消选取      
  all.checked=false;      
 }      
 else{                 //如果是选取，就要判断其他是否都已经全部选取了      
  var aa=document.getElementsByName(e.name);      
  for(var i=0;i<aa.length;i++){      
   if(!aa[i].checked){//如果有一个没有选上，那么就返回      
    return;      
   }      
  }      
  all.checked=true;//如果其他都选上了，全选框就要选上      
 }      
}      
</script>      
<head>      
<body>      
 <div>      
      <table border=1>      
        <tr>      
            <th><input type=checkbox><label for='selectAll'>全选</label></th>      
            <th>text</th>      
        </tr>      
              
        <tr>      
            <td><input type=checkbox name='cb'></td>      
            <td>11111</td>      
        </tr>      
     
        <tr>      
            <td><input type=checkbox name='cb'     
           ></td>      
            <td>22222</td>      
        </tr>      
     
        <tr>      
            <td><input type=checkbox name='cb'     
           ></td>      
            <td>33333</td>      
        </tr>      
     
        <tr>      
            <td><input type=checkbox name='cb'     
           ></td>      
            <td>44444</td>      
        </tr>      
     
      </table>      
     
    </div>      
</body>      
</html>