jQuery实现复选框CheckBox全选、全不选的代码片段

<!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 runat="server">
<script src="http://code.jquery.com/jquery-1.4.4.min.js" type="text/javascript"></script>    <script type="text/javascript">
        $(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>

运行截图

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