解决hello mui中选项卡页面，resume事件后，顶部标题延迟渲染的问题

examples/hello-mui/examples/tab-webview-main.html

@@ -41,6 +41,8 @@
 		<script src="../js/mui.min.js"></script>
 		<script src="../js/app.js"></script>
 		<script type="text/javascript" charset="utf-8">
+			//mui初始化
+			mui.init();
 			var subpages = ['tab-webview-subpage-about.html','tab-webview-subpage-chat.html','tab-webview-subpage-contact.html','tab-webview-subpage-setting.html'];
 			var subpage_style = {
 				top: '46px',