<html>
<head>
<title>用Jquery实现复选框的全选</title>
<script src="../javascript/jquery-1.4.2.min.js"></script>
<script type="text/javascript">
$(function () {
$(function() {
$("#checkAll").click(function() {
$(‘input[name="subBox"]‘).attr("checked",this.checked);
});
var $subBox = $("input[name=‘subBox‘]");
$subBox.click(function(){
$("#checkAll").attr("checked",$subBox.length == $("input[name=‘subBox‘]:checked").length ? true : false);
});
});
})
</script>
</head>
<body>
<div>
<input id="checkAll" type="checkbox">全选
<input name="subBox" type="checkbox" />项1
<input name="subBox" type="checkbox" />项2
<input name="subBox" type="checkbox" />项3
<input name="subBox" type="checkbox" />项4
</div>
</body>
</html>原文：http://www.cnblogs.com/Dionexin/p/5955091.html