這篇文章主要為大家詳細(xì)介紹了基于javascript實(shí)現(xiàn)簡(jiǎn)單的抽獎(jiǎng)系統(tǒng)，具有一定的參考價(jià)值，感興趣的小伙伴們可以參考一下
本文實(shí)例為大家分享了js實(shí)現(xiàn)簡(jiǎn)單的抽獎(jiǎng)系統(tǒng)，供大家參考，具體內(nèi)容如下
<!doctype html>
<html lang="en">
<head>
<meta charset="gb2312">
<title>抽獎(jiǎng)活動(dòng)</title>
<style>
*{
margin:0;padding:0;
}
#title{
color:red;text-align:center;margin:0 auto;width:240px;height:70px;padding-top:10px;background:opacity(0);
}
.btns{
width:190px;height:30px;margin:0px auto;
}
.btns span{
display:block;float:left;width:80px;height:28px;text-align:center;background:#036;color:#fff;cursor:pointer;border:1px solid #eee;border-radius:8px;font-family:"微軟雅黑";font-size:14px;line-height:28px;margin-right:10px;
}
#txt{
font-size:14px;color:#ccc999;text-align:center;margin:0 auto;width:190px;height:50px;padding-top:10px;
}
</style>
<script>
var mytype=["iPhone6s","iPad Air2","DELL外星人","鍵鼠套裝","1000元超市購(gòu)物卡","200元話費(fèi)充值卡","謝謝參與","品牌耳機(jī)","港澳臺(tái)7日游","50元優(yōu)惠券"],//定義獎(jiǎng)品池
timer=null,
count=0;
//加載時(shí)觸發(fā)
window.onload=function(){
var start = document.getElementById("start");
var stop = document.getElementById("stop");
start.onclick=startFun;//這個(gè)函數(shù)后面加括號(hào)，就直接調(diào)用了該函數(shù)，所以不要加
stop.onclick=stopFun;
//綁定鍵盤(pán)事件
document.onkeyup=function(e){
e = e || window.event;
if(e.keyCode==13){
if(count==0){
startFun();
count=1;
}
else{
stopFun();
count=0;
}
}
}
}
//點(diǎn)擊開(kāi)始，標(biāo)題欄開(kāi)始輪動(dòng)
function startFun(){
clearInterval(timer);//開(kāi)始時(shí)，清除計(jì)時(shí)器，避免二次觸發(fā)
var title = document.getElementById("title");
var start = document.getElementById("start");
timer = setInterval(function(){
var num= Math.floor(Math.random()*mytype.length);
title.innerHTML=mytype[num];
},50);
start.style.background="#ccc";
}
//點(diǎn)擊停止，標(biāo)題欄停止輪動(dòng)并輸出輪動(dòng)結(jié)果
function stopFun(){
var start = document.getElementById("start"),
txt = document.getElementById("txt"),
title = document.getElementById("title");
clearInterval(timer);//清除計(jì)時(shí)器，停止計(jì)時(shí)器
start.style.background="#036";
}
</script>
<body>
<div>
<h2 id="title">開(kāi)始抽獎(jiǎng)！</h2>
</div>
<div>
<span id="start">開(kāi)始</span>
<span id="stop">停止</span>
</div>
<div id="txt">支持回車(chē)鍵(Enter)開(kāi)始/停止。</div>
</body>
</html>
效果圖：
