JavaScript点击产生星星 

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title></title>
    <style>
        div {
            width: 500px;
            height: 500px;
            background-color: black;
            border: 5px solid red;
            position: relative;
        }

        span {
            position: absolute;
            font-size: 40px;
            color: yellow;
        }
    </style>
</head>
<body>
<input type="button" value="闪闪发光" id="bt"/>
<input type="button" value="停止" id="bt1"/>
<div id="dv">

</div>
<script src="common.js"></script>
<script>
    my$("bt").onclick = function () {
        timeId1 = setInterval(function () {
            my$("dv").innerHTML = "<span>★</span>";
            var x = parseInt(Math.random() * 500 + 1);
            var y = parseInt(Math.random() * 500 + 1);
            my$("dv").firstElementChild.style.left = x + "px";
            my$("dv").firstElementChild.style.top = y + "px";
        }, 10)
    };
    my$("bt1").onclick = function () {
      clearInterval(timeId1);
    };
</script>
</body>
</html>

 

posted @ 2018-08-01 14:56  {颜逸}  阅读(361)  评论(0)    收藏  举报