JS_点击事件_弹出窗口_自动消失

<!doctype html>
<html>
<head>
<meta charset="utf-8"/>
<title>电灯开关案例</title>


<script>
    /** 练习：点击按钮，开灯或关灯 */
    var flag = false;//false表示默认状态为关灯
    function changeImg(){
        console.log("this is show work good!");
        showInfo=window.open("3.html",'','width=200,height=100');
    }
    function closeit()
    {
    setTimeout("showInfo.close()", 2000)   //毫秒
    }
   
</script>
</head>
<body>
    <input type="button" value="开/关灯"
        onclick="changeImg()" /> <br/><br/>

<body onload="closeit()">    
</body>
</html>

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