append的使用+抽奖（作弊）+打开关闭另一个页面+倒计时

来源：互联网发布：苹果截图快捷键mac 编辑：程序博客网时间：2024/06/05 10:53

就是一个单元格，下面标注什么科目，点击，在单元格里显示

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        *{
            margin: 0;
            padding: 0;
        }
        ul{
            width: 400px;
            height: 400px;
            border:1px solid #999;
        }
        ul li{
            list-style: none;
            width: 80px;
            height: 40px;
            line-height: 40px;
            text-align: center;
            border: 1px solid #999;
            margin: 10px;
            float: left;
        }
        span{
            padding-left: 6px;
        }
    </style>
</head>
<body>
<ul>

</ul>
<div>
    <button>语文</button>
    <button>数学</button>
    <button>英语</button>
    <button>政治</button>
    <button>历史</button>
    <button>地理</button>
    <button>体育</button>
</div>
<script>
    var ul=document.getElementsByTagName("ul")[0];
    var btns=document.getElementsByTagName("button");
    for(var i=0;i<btns.length;i++){
        btns[i].onclick=function(){
            var nli=document.createElement("li");
            nli.innerHTML=this.innerHTML+"<span>✖</span>";
            ul.append(nli);
            var span=nli.getElementsByTagName("span")[0];
            span.onclick=function(){
                ul.removeChild(this.parentNode);
            }
        }
    }
</script>
</body>
</html>

抽奖（作弊）

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        .box{
            width: 300px;
            padding: 20px 30px;
            border: 1px solid #999;
        }
    </style>

</head>
<body>
<div class="box">

</div>
<button>开始抽奖</button>
<button>结束抽奖</button>
<script>
    /*找见我们要操作的元素*/
    var box=document.getElementsByTagName("div")[0];
    var aBtn=document.getElementsByTagName('button');
    /*找见字符串之后将字符串转化成数组*/
    var student_arr="蒋丁然,武晓瑞,吴彤,王路斌,王一鸣,王亚杰,尹殿壮,曾付周,高阳,王娇,陈童," +
            "李景钱,卢源博,闫鑫,李岚峰,薛剑,王桦林,王京京,白新飞,张钟文,董洲,辛凯斌,李健," +
            "田孟杰,周旋,李培,杜天旭,张宇璇,王文倩,景壮壮,刘梦欣,崔红佳,张忍,李泽阳,陈文艳," +
            "史宏稼,王广,杨群,周子鹏,梁旭东,杨珂,陈景超,贾东杭,于力国";
    var arr=student_arr.split(",");
    var timmer;
    /*点击开始*/
    aBtn[0].onclick=function(){
        /*执行循环定时器*/
        timmer=setInterval(function(){
            /*生成随机数（特别注意arr.length）(随机数要写到循环里)*/
            var random=parseInt(Math.random()*arr.length);
            /*改变目标元素的内容*/
            box.innerHTML=arr[random];
        },0.1)
    };
    aBtn[1].onclick=function(){
        clearInterval(timmer);
        /*作弊*/
        box.innerHTML="辛凯斌";
    }

</script>
</body>
</html>

打开关闭另一个页面

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script>
/*        var salary=prompt("请输入工资");
        if(salary>20000){
            document.write("土豪");
        }else if(salary<5000){
            document.write("屌丝");
        }else{
            document.write("一般人");
        }*/
    </script>
</head>
<body>
<p onclick="window.open('http://www.w3school.com.cn/')">打开</p>
<p onclick="window.close()">关闭</p>
</body>
</html>

倒计时

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>

</head>
<body>
<div id="result">0</div>
<span id="begain">开始</span>
<span id="stop">结束</span>
<script>
    var n=0;
    /*定时器*/
    var begain=document.getElementById("begain");
    var stop=document.getElementById("stop");
    var timmer;
    begain.onclick=function(){
        timmer=setInterval(function(){
            n++;
            document.getElementById("result").innerHTML=n;
        },1000)
    };
    stop.onclick=function(){
        clearInterval(timmer);
    }

</script>
</body>
</html>

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