可以应用于游戏机或卜卦中
如果需要降低某种结果的概率，请自行添加算法处理。本例仅作简单的随机处理。
<!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>
</head>
<body>
<img id="img1" style="display: inline-block;" src="https://www.baidu.com/img/flexible/logo/pc/result.png" width="150" height="45">
<img id="img2" style="display: inline-block;" src="https://www.baidu.com/img/flexible/logo/pc/result.png" width="150" height="45">
<img id="img3" style="display: inline-block;" src="https://www.baidu.com/img/flexible/logo/pc/result.png" width="150" height="45">
<!-- 这里图片的路径src， 自己找一张图，写上自己的路径就好了 -->
<p>
<button id="btn">停止或启动</button>
</p>
<script>
var timer = null;//全局命名定时器的名字
var img1,img2,img3,src1,src2,rand1,rand2,rand3;
window.onload = function () {
img1 = document.getElementById('img1');
img2 = document.getElementById('img2');
img3 = document.getElementById('img3');
src1 = 'https://www.baidu.com/img/flexible/logo/pc/result.png';
src2 = 'https://p.ssl.qhimg.com/t012cdb572f41b93733.png';
};
var flag = false;//全局声明状态切换的初始值
btn.onclick = function () {
if (flag) {
clearInterval(timer);
console.log('src1:'+rand1);
console.log('src2:'+rand2);
console.log('src3:'+rand3);
console.log('定时器已停止');
flag = false;
} else if (flag == false) {
console.log('定时器启动');
timer = setInterval(() => {
rand1 = Math.round(Math.random()*1);
rand2 = Math.round(Math.random()*1);
rand3 = Math.round(Math.random()*1);
if(rand1) img1.src = src1;
else img1.src = src2;
if(rand2) img2.src = src1;
else img2.src = src2;
if(rand3) img3.src = src1;
else img3.src = src2;
}, 100);
flag = true;
}
}
</script>
</body>
</html>
