1到10随机数展示，可暂停继续，空格控制。
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title></title>
</head>
<body style="text-align:center;background:#ccc;padding-top:100px;">
<h2 id="box">0</h2>
<button id="stop">停止</button>
<button id="continue">继续</button>
<p>记录：</p>
<ul id="ul" style="width:100px;margin: 0 auto;"></ul>
<script>
;(function(){
var remark = false;
var s = setInterval(rand,30);
function rand(){ //随机函数
var m = parseInt(Math.random() * 10) + 1;
gets("box").innerHTML = m;
}
function gets(str){ //根据id获取元素
return document.getElementById(str);
}
function getBoxText(){ //获取box的值
return gets("box").innerHTML;
}
function setLiText(t){ //在ul中记录值
var li = document.createElement("li");
li.innerHTML = t;
gets("ul").appendChild(li);
}
gets("continue").onclick = continueRandom;
function continueRandom(){ //继续
if(!s){
s = setInterval(rand,30);
}
remark = false;
this.blur();
};
gets("stop").onclick = stopRandom;
function stopRandom(){ //停止
clearInterval(s);
s = null;
if(!remark){
setLiText(getBoxText());
remark = true;
}
this.blur();
};
document.onkeyup = function(event){ //空格键
event = event || window.event;
if(event.keyCode === 32 && s){
stopRandom();
}else if(event.keyCode === 32 && !s){
continueRandom();
}
};
})()
</script>
</body>
</html>