显示启动页倒计时

app/html/guide.html

		<style>
			.box {position: absolute;z-index: 2;top: 0;bottom: 0;left: 0;right:0;overflow: hidden;background: #ffffff;}			
			.footer {width:100%;height:18%;background:#fff;display: flex;align-items: center;justify-content: center;position: fixed;bottom: 0;}
			.skip {position: fixed;top: 3%;right: 5%;background: rgba(0, 0, 0, 0.15);text-align: center;color: #fff;z-index:3;border-radius: 40px;}
			.skip {position: fixed;top: 3%;right: 5%;background: rgba(0, 0, 0, 0.15);text-align: center;color: #fff;z-index:3;border-radius: 60px;}
			.skip:before{content: "跳过广告";}
		</style>
	</head>
				<img class="logo" src="../images/logo.png" width="20%"/>
			</div>
		</div>
		<div class="skip" id="close"></div>
		<div class="skip" id="close"><span></span></div>
	</body>
	<script src="../js/public/mui.min.js"></script>
	<script src="../js/public/base.js"></script>
		var anos=ifiosAmdandroid();
		var footer=document.getElementsByClassName("footer")[0]
		var skip=document.getElementsByClassName("skip")[0]
		var closet=document.getElementById("close")
		if(anos==0){//android
			skip.style.fontSize="36px";
			skip.style.padding="20px 36px";
			skip.style.padding="18px 36px";
		}else{
//			footer.style.height="18%";
			skip.style.fontSize="16px";
			skip.style.padding="10px 20px";
		}
		mui.ready(function() {
			var ua = navigator.userAgent.toLowerCase(); 
			if(/android|adr/gi.test(ua)){
				document.getElementsByClassName("footer")[0].style.height=""
				document.getElementsByClassName("skip")[0].style.height=""
				footer.style.height=""
				skip.style.height=""
			}
			mui.plusReady(function() {
				plus.navigator.setFullscreen(true);
				plus.navigator.closeSplashscreen();
			});
			document.getElementById("close").addEventListener('tap', function(event) {
			closet.addEventListener('tap', function(event) {
				plus.navigator.setFullscreen(false);
				plus.webview.currentWebview().close();
			}, false);
			setTimeMiu(5)
			function setTimeMiu(n) {
				var i = 0;
				var i = n;
				var Timer = setInterval(function() {
					i++;
					if(i == n - 1) {
					closet.querySelector("span").innerHTML=i+"s"
					if(i == 0) {
						plus.navigator.setFullscreen(false);
						plus.webview.currentWebview().close();
						clearInterval(Timer);
					}
					i--;
				}, 1000);
			}
		})