diff --git a/examples/hello-mui/examples/ad.html b/examples/hello-mui/examples/ad.html
index 94f7dfbc..127d59bd 100644
--- a/examples/hello-mui/examples/ad.html
+++ b/examples/hello-mui/examples/ad.html
@@ -64,6 +64,9 @@ <h1 class="mui-title">advertisement（广告模板）</h1>
 				var adBottom = mui.os.ios?('-'+adHeight+'px'):'0';
 				
 				var ad = plus.webview.create(url,'ad',{height:adHeight+'px',bottom:adBottom,position:"absolute"});
+
+				ad.appendJsFile('_www/js/ad.js');
+				
 				//目前Android平台不支持子webview的setStyle动画，因此分平台处理；
 				if(mui.os.ios){
 					//为了支持iOS平台左侧边缘滑动关闭页面，需要append进去；
@@ -82,8 +85,6 @@ <h1 class="mui-title">advertisement（广告模板）</h1>
 					});
 				}
 				
-				ad.appendJsFile('_www/js/ad.js');
-				
 				//设置主页面的底部留白，否则会被遮住；
 				document.querySelector('.mui-content').style.paddingBottom = adHeight + 'px';
 			}
diff --git a/examples/hello-mui/js/ad.js b/examples/hello-mui/js/ad.js
index a64fd033..f9d86598 100644
--- a/examples/hello-mui/js/ad.js
+++ b/examples/hello-mui/js/ad.js
@@ -12,4 +12,12 @@ document.querySelector("body").addEventListener('click',function (event) {
 },true);
 	
 
-
+(function appendVW() {
+	var content = 'width=device-width,initial-scale=1,minimum-scale=1,maximum-scale=1,user-scalable=no';
+	if(!document.querySelector('meta[name=viewport]')) {
+		var meta = document.createElement('meta');
+		meta.name = 'viewport';
+		meta.content = content;
+		document.getElementsByTagName('head')[0].appendChild(meta);
+	}
+})();