javascript获得CheckBoxList选中的数量_javascript技巧



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






//jQuery的方法(王君)
$(function(){
$("#chkBox").click(function(){
alert($("#chkBox input[@type=checkbox]:checked").size());
});
});
//javacript方法(候林)
function f(){
var a=document.getElementsByTagName('input')
var num=0;
for(var i=0;iif(a[i].type=='checkbox'){
if(a[i].checked==true)
num+=1;
}
}
alert(num);
}

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);
}
}