javascript中级--点击事件即事件对象event

一、点击事件

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <script>
        document.onclick = function() { //document是最顶层的父节点
            alert('a');
        }
    </script>
</head>

<body>

</body>

</html>

 二、事件对象event

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <script>
        document.onclick = function(ev) {
            //ie
            // alert(event.clientX + '--' + event.clientY); //event对象
            //ff
            // alert(ev.clientX + '--' + ev.clientY);
            // alert(ev);
            // if (ev) {
            //     alert(ev.clientX + '--' + ev.clientY);
            // } else {
            //     alert(event.clientX + '--' + event.clientY);
            // }
            var oEvent = ev || event;
            alert(oEvent.clientX + '--' + oEvent.clientY); //clientX clientY页面可视区的坐标
        }
    </script>
</head>

<body>

</body>

</html>

 

posted @ 2017-03-03 17:41  Mr_W_Blog  阅读(346)  评论(0)    收藏  举报