var?data=['Phone5','Ipad','三星筆記本','佳能相機','惠普打印機','謝謝參與','50元充值卡','1000元超市購物券'],
????timer=null,
????flag=0;

window.onload=function(){
????var?play=document.getElementById('play'),
????????stop=document.getElementById('stop');

????//?開始抽獎
????play.onclick=playFun;
????stop.onclick=stopFun;

???//?鍵盤事件
???document.onkeyup=function(event){
??????event?=?event?||?window.event;
??????if(event.keyCode==13){
?????????if(flag==0){
???????????playFun();
?????????}else{
???????????stopFun();
?????????}
??????}
???}
}

function?playFun(){
	var?title=document.getElementById('title');
	var?play=document.getElementById('play');
	flag?=?1;
	clearInterval(timer);
	timer=setInterval(function(){
	???var?random=Math.floor(Math.random()*data.length);
	???title.innerHTML=data[random];
	},50);
????play.style.background='#999';
}

function?stopFun(){
	flag?=?0;
	clearInterval(timer);
	var?play=document.getElementById('play');
	play.style.background='#036';
}

flag應該在函數里設置，否則會有bug，當第一次點擊鼠標，必須兩次enter才能停止