weChat header and footer

@@ -89,7 +89,7 @@ $('.phoneapp').mouseenter(function() {
     _hmt.push(['_trackEvent', '二维码', '头部手机版', '', '']);
 });
 
-$('.weChat').mouseenter(function() {
+$('.we-chat').mouseenter(function() {
     _hmt.push(['_trackEvent', '二维码', '头部手机版', '', '']);
 }).click(function() {
     _hmt.push(['_trackEvent', '二维码', '头部手机版', '', '']);

@@ -431,7 +431,7 @@
         }
 
         .we-chat-code {
-            background-image: resolve("layout/weChat.png");
+            background-image: resolve("layout/qr-weixin.png");
             background-repeat: no-repeat;
             background-size: 100% 100%;
         }

@@ -264,7 +264,7 @@
 
             .we-chat-img {
                 position: relative;
-                background-image: resolve("layout/weChat.png");
+                background-image: resolve("layout/qr-weixin.png");
                 background-repeat: no-repeat;
                 background-size: 100% 100%;
             }