<!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>無標題文檔</title>
<script>
window.onload = function () {
var oBtn1 = document.getElementById('btn1');
var oBtn2 = document.getElementById('btn2');
var oBtn3 = document.getElementById('btn3');
var odiv = document.getElementById('div1');
var aCh = odiv.getElementsByTagName('input');
oBtn1.onclick = function () {
for (var i = 0; i < aCh.length; i++) {
aCh[i].checked = true;
}
};
oBtn2.onclick = function () {
for (var i = 0; i < aCh.length; i++) {
aCh[i].checked = false;
}
};
oBtn3.onclick = function () {
for (var i = 0; i < aCh.length; i++) {
if(aCh[i].checked == true)
{
aCh[i].checked=false;
}
else
{
aCh[i].checked = true;
}
}
};
};
</script>
</head>
<body>
<input id="btn1" type="button" value="全選" /><br />
<input id="btn2" type="button" value="不選" /><br />
<input id="btn3" type="button" value="反選" /><br />
<div id="div1">
<input type="checkbox" /><br />
<input type="checkbox" /><br />
<input type="checkbox" /><br />
<input type="checkbox" /><br />
<input type="checkbox" /><br />
<input type="checkbox" /><br />
<input type="checkbox" /><br />
<input type="checkbox" /><br />
</div>
</body>
</html>
一個很簡單的全選、不選與反選小實例。