javascript获得CheckBoxList选中的数量

jQuery的选择器真的好强大，好灵活。 javascript的原始方法也值得研究。
复制代码 代码如下:
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="CheckBoxList.aspx.cs" Inherits="CheckBoxList" %>













复制代码 代码如下:
using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
public partial class CheckBoxList : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void btnOk_Click(object sender, EventArgs e)
{
int totalNum = 0;//总数
string list = "000";//选中的值
for (int i = 0; i < this.chkBox.Items.Count; i++)
{
if (chkBox.Items[i].Selected)
{
totalNum += 1;
list += "," + chkBox.Items[i].Value;
}
}
Response.Write(totalNum.ToString() + "|" + list);
}
}