jQuery实现CheckBox全选、全不选

<!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">

<title>jQuery实现CheckBox全选、全不选</title>

<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>

</html>

 

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