求一个使用javaScript实现全选和反选的例子
最近想练一练javaScript，所以求一个实现了全选和反选的例子。
会的发下。
[解决办法]
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html;charset=UTF-8">
<title></title>
<script type="text/javascript">
window.onload = function() {
var all = document.getElementById("all");
//注意: all.onchange=selectAll()
//表示调用方法并将其返回值赋值
all.onchange = selectAll;
document.getElementById("reverse")
.onchange = function() {
var inps =
document.getElementsByTagName("input");
for(var i=0;i<inps.length;i++) {
var type = inps[i].getAttribute("type");
if("checkbox" == type) {
if("all" !=
inps[i].getAttribute("id") ) {
inps[i].checked = !inps[i].checked;
}
}
}
};
}
function selectAll() {
var flag = this.checked;
var inps =
document.getElementsByTagName("input");
for(var i=0;i<inps.length;i++) {
var type = inps[i].getAttribute("type");
if("checkbox" == type) {
if(inps[i].getAttribute("id") ==
"reverse" ) {
inps[i] = false;
}else {
inps[i].checked = flag;
}
}
}
}
</script>
</head>
<body>
<h1>您喜欢的计算机品牌</h1>
苹果 <input name="" type="checkbox"><br>
索尼 <input name="" type="checkbox"><br>
三星 <input name="" type="checkbox"><br>
华硕 <input name="" type="checkbox"><br>
宏 <input name="" type="checkbox"><br>
全选 <input id="all" name="" type="checkbox">
反选 <input id="reverse" name="" type="checkbox">
</body>
</html>
[解决办法]
<HTML>
<HEAD>
<TITLE> New Document </TITLE>
<META NAME="Generator" CONTENT="EditPlus">
<META NAME="Author" CONTENT="">
<META NAME="Keywords" CONTENT="">
<META NAME="Description" CONTENT="">
<script language="javascript">
function unselectall(){
if(document.myform.chkAll.checked){
document.myform.chkAll.checked = document.myform.chkAll.checked&0;
}
}
function CheckAll(form){
for (var i=0;i<form.elements.length;i++){
var e = form.elements[i];
if (e.Name != 'chkAll'&&e.disabled==false)
e.checked = form.chkAll.checked;
}
}
</script>
</HEAD>
<BODY>
<form name="myform" method="post" id="myform" action="" >
<input name='id' type='checkbox' onclick='unselectall()' id='id' value='1'> 设计家园
<input name='id' type='checkbox' onclick='unselectall()' id='id' value='2'> 网页教程
<input name='id' type='checkbox' onclick='unselectall()' id='id' value='3'> 酷站欣赏
<input name='id' type='checkbox' onclick='unselectall()' id='id' value='4'> 网页素材
<input name='chkAll' type='checkbox' id='chkAll' onclick='CheckAll(this.form)' value='checkbox'>
全选
</form>
</BODY>
</HTML>
刚在网上看到个，觉得还不错，分享下。。。
[解决办法]
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>复选框（checkbox）全选/全不选/返选</title>
<style>
body,dl,dt,dd,p{margin:0;padding:0;}
body{font-family:Tahoma;font-size:12px;}
label,input,a{vertical-align:middle;}
label{padding:0 10px 0 5px;}
a{color:#09f;text-decoration:none;}
a:hover{color:red;}
dl{width:120px;margin:10px auto;padding:10px 5px;border:1px solid #666;border-radius:5px;background:#fafafa;}
dt{padding-bottom:10px;border-bottom:1px solid #666;}
dt label{font-weight:700;}
p{margin-top:10px;}
</style>
<script type="text/javascript">
window.onload = function ()
{
var oA = document.getElementsByTagName("a")[0];
var oInput = document.getElementsByTagName("input");
var oLabel = document.getElementsByTagName("label")[0];
var isCheckAll = function ()
{
for (var i = 1, n = 0; i < oInput.length; i++)
{
oInput[i].checked && n++
}
oInput[0].checked = n == oInput.length - 1;
oLabel.innerHTML = oInput[0].checked ? "全不选" : "全选"
};
//全选/全不选
oInput[0].onclick = function ()
{
for (var i = 1; i < oInput.length; i++)
{
oInput[i].checked = this.checked
}
isCheckAll()
};
//反选
oA.onclick = function ()
{
for (var i = 1; i < oInput.length; i++)
{
oInput[i].checked = !oInput[i].checked
}
isCheckAll()
};
//根据复选个数更新全选框状态
for (var i = 1; i < oInput.length; i++)
{
oInput[i].onclick = function ()
{
isCheckAll()
}
}
}
</script>
</head>
<body>
<dl>
<dt><input type="checkbox" id="checkAll" /><label>全选</label><a href="javascript:;">反选</a></dt>
<dd>
<p><input type="checkbox" name="item" /><label>选项（一）</label></p>
<p><input type="checkbox" name="item" /><label>选项（二）</label></p>
<p><input type="checkbox" name="item" /><label>选项（三）</label></p>
<p><input type="checkbox" name="item" /><label>选项（四）</label></p>
<p><input type="checkbox" name="item" /><label>选项（五）</label></p>
<p><input type="checkbox" name="item" /><label>选项（六）</label></p>
<p><input type="checkbox" name="item" /><label>选项（七）</label></p>
<p><input type="checkbox" name="item" /><label>选项（八）</label></p>
<p><input type="checkbox" name="item" /><label>选项（九）</label></p>
<p><input type="checkbox" name="item" /><label>选项（十）</label></p>
</dd>
</dl>
<center>1、切换全选/全不选文字；2、根据选中个数更新全选框状态；</center>
</body>
</html>
[解决办法]
给楼主一个简单的基于jquery的代码吧
var checkAllORNOT=function(){
var checkboxes = $("input@[type='checkbox']");
checkboxes.each(function(){
var currentObj = $(this);
if(currentObj.get(0).checked){
currentObj.get(0)=checked=false;
}else{
currentObj.get(0)=checked=true;
}
});
}
[解决办法]
// 全选 反选
/**
*topId 点击全选或者反选的元素Id
subName 复选框的name属性
**/
function selectAll(topId,subName){
var check=document.getElementById(topId);
var se = document.getElementsByName(subName);
for(var i=0;i<se.length;i++){
if(check.checked){
se[i].checked=true;
}else{
se[i].checked=false;
}
}
}