<DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>content</title>
<style type="text/css">
html,body,div,button{margin: 0;padding: 0;}
.title{margin: 0 auto;width: 300px;height: 100px;margin-top: 50px;text-align: center;color: #f00;font-weight: bold;font-size:30px; }
.btns{width: 300px;height: 30px;margin: 0 auto;}
button{display: block;float: left;
width: 100px;height: 25px;line-height: 25px;background-color: orange;border: 1px solid #eee;border-radius: 5px;outline: none;cursor: pointer;color:#fff;font-family: "微软雅黑"
}
#stop{float: right;}
</style>
</head>
<body>
<div class="title" id="title">开始抽奖</div>
<div class="btns">
<button id="start">开始</button><button id="stop">停止</button>
</div>
<script type="text/javascript">
// 绑定事件
window.onload=function(){
var start=document.getElementById("start"),
stop=document.getElementById("stop");
dontknow.addEvent(start,"click",action);
dontknow.addEvent(stop,"click",mystop);
}
var data=["iphone5","ipad","三星笔记本","佳能相机","50元充值券","谢谢参与"],
timer=null,
dontknow={
addEvent:function(ele,type,handle){
ele.addEventListener?ele.addEventListener(type,handle):ele.attachEvent("on"+type,handle);
},
removeEvent:function(ele,type,handle){
ele.removeEventListener?ele.removeEventListener(type,handle):ele.detachEvent("on"+type,handle);
}
};
var flag=true; //判断抽奖是否开始进行，若开始则flag=false
// 抽奖开始函数
function action(){
var otitle=document.getElementById("title");
var start=document.getElementById("start");
if(timer==null){
timer=setInterval(change,50);
start.style.backgroundColor="#ccc";
flag=!flag;}
};
// 奖品改变函数
function change(){
var otitle=document.getElementById("title");
var num=Math.floor(Math.random()*data.length);
otitle.innerHTML=data[num];
};
// 抽奖停止函数
function mystop(){
var start=document.getElementById("start");
start.style.backgroundColor="orange";
clearInterval(timer);
timer=null;
flag=!flag;
}
// 键盘事件 keyDown keyPress keyUp
document.onkeyup=function(event){
event=event||window.event;
if(event.keyCode==13){
if(flag){
action();
}
else if(!flag){
mystop();
}
}
};
</script>
</body>
</html>不知道楼主有没有找到原因，同问
dontknow={
addEvent:function(ele,type,handle){
ele.addEventListener?ele.addEventListener(type,handle):ele.attachEvent("on"+type,handle);
},
removeEvent:function(ele,type,handle){
ele.removeEventListener?ele.removeEventListener(type,handle):ele.detachEvent("on"+type,handle);
}
};
将此换成
start.onclick=action;
stop.onclick=mystop;
之后你所说的问题就解决了但是会出现：
某次用鼠标操作之后再按回车键就不起作用了