添加遮罩层

html/downloadApp.html

@@ -50,6 +50,14 @@
       bottom: 4rem;
       width: 100%; */
     }
+   #tc{
+      position: fixed;
+      top: 0;
+      height: 100%;
+      background: rgba(0, 0, 0, 0.5);
+      width: 100%;
+      display: none;
+    }
   </style>
 </head>
 
@@ -63,6 +71,7 @@
         <img src="../images/dload_logo.png" alt="">
       </div>
     </div>
+    <div id="tc"></div>
   </div>
 	<script type="text/javascript" src="../js/jquery-1.10.2.js"></script>
 	<script type="text/javascript" src="../js/md5.js"></script>
@@ -74,6 +83,10 @@
 	
   <script>
     function downLoad(){
+      var ua = navigator.userAgent.toLowerCase();//获取判断用的对象
+      if (ua.match(/MicroMessenger/i) == "micromessenger") {//在微信中打开
+        $('#tc').css('display', 'block')      
+      }
       var u = navigator.userAgent, app = navigator.appVersion;
         var isAndroid = u.indexOf('Android') > -1 || u.indexOf('Linux') > -1; //android终端或者uc浏览器
         var isiOS = !!u.match(/\(i[^;]+;( U;)? CPU.+Mac OS X/); //ios终端