jQuery检查复选框是否被选 

<!DOCTYPE html>
<html>
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <title>检查复选框是否被选</title>
    <meta charset="utf-8" />
    <script src="Scripts/jquery-1.12.4.js"></script>
</head>
<body>
    <form>
        <input type="checkbox" id="cr" name="cr" />
        <input type="checkbox" id="cr2" name="cr2" checked="checked" />
    </form>

    <script>
        var $cr = $("#cr");//jquery对象
        var cr = $cr[0];   //dom对象

        var $cr2 = $("#cr2");
        var cr2 = $cr2[0];

        alert($cr.checked); //undefined
        alert(cr.checked);//false

        alert(cr2.checked);//true
    </script>
</body>
</html>

　　

posted @ 2017-08-12 14:22  海阔天空XM  阅读(355)  评论(0)  编辑  收藏  举报