Use Math objects to generate random integers between 1 and 60
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>选号器</title>
</head>
<style type="text/css">
.inputTxt{
height: 500px;
width: 600px;
font-size: 360px;
text-align: center;
}
</style>
<body>
<center>
<form name="myForm">
<input name="myText" type="text" value="0" class="inputTxt" id="in1" />
<input name="start" type="button" value="开始" onclick="startScroll()" />
<input name="stop" type="button" value="停止" onclick="stopScroll()" />
</form>
</center>
<script type="text/javascript">
var timer;
//点击开始按钮
function startScroll(){
//产生1~60之间的随机整数
var num=Math.floor(Math.random()*60+1);
//document.getElementById("in1").value=num; //第一种写法
document.myForm.myText.value=num; //第二种写法
//使用定时器函数，60毫秒调用函数
timer=setTimeout("startScroll()",60);
}
//点击停止按钮
function stopScroll(){
//清除定时器
clearTimeout(timer);
}
</script>
</body>
</html>
