/**

* Created by lijiabin01 on 04/08/2017.

*/

var data=["iphone6", "佳能相机", "笔记本", "ipad", "50元购物卡", "谢谢参与", "单反", "球票"],

timer=null,

flag=0;

window.onload = function () {

var play=document.getElementById("play"),

stop=document.getElementById("stop");

play.onclick = playFun;

stop.onclick = stopFun;

// 键盘事件,document代表整个网页响应

document.onkeyup = function (event) {

event = event || window.event;

console.log(event);

// 13代表回车键

if (event.keyCode == 13) {

if (flag==0) {

playFun();

flag = 1;

}

else {

stopFun();

flag = 0;

}

}

else {

console.log("不是回车键");

}

}

}

function playFun() {

//this是指play那个按钮

// var that=this;

var title=document.getElementById("title");

var play=document.getElementById("play");

clearInterval(timer);

timer=setInterval(function () {

// console.log("hello");

var random=Math.floor(Math.random()*data.length);

title.innerHTML = data[random];

}, 50);

// document不能设置背景颜色

play.style.backgroundColor = "gray";

}

function stopFun() {

clearInterval(timer);

var play=document.getElementById("play");

play.style.backgroundColor = "#036";

}