sale click through

@@ -263,6 +263,12 @@ navHammer.on('tap', function(e) {
         navType,
         $active;
 
+    e.preventDefault();
+
+    if (typeof $this === 'undefined' || $this.length === 0) {
+        return;
+    }
+
     if ($this.hasClass('filter')) {
 
         //筛选面板切换状态
@@ -359,4 +365,4 @@ $(window).scroll(function() {
 });
 
 //初始请求最新第一页数据
-search();
+search();
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