diff --git a/components/diy_goodsGroup/diy_goodsGroup.js b/components/diy_goodsGroup/diy_goodsGroup.js
index 38255a6..7ac451a 100644
--- a/components/diy_goodsGroup/diy_goodsGroup.js
+++ b/components/diy_goodsGroup/diy_goodsGroup.js
@@ -75,10 +75,13 @@ Component({
 	  }
 	   	   		
       // 在组件实例进入页面节点树时执行
-	  if(nav_item)  
-         this.data.classstyle_id = nav_item.classstyle;
+	  if(nav_item) {
+		   this.data.classstyle_id = nav_item.classstyle;  
+		   this.data.wgroup =nav_item.wgroup;
+	  } 
+        
       this.data.goodscount = this.data.object.goodscount;
-      this.data.wgroup =nav_item.wgroup;
+    
 	  
 	  var hei=280;
 	  if(this.data.object.goodstit) hei+=80;
@@ -87,13 +90,13 @@ Component({
   
 	  this.setData({swiper_hei:hei});
 	  
-      if (nav_item.goodsclass == 1) {
+      if (nav_item && nav_item.goodsclass == 1) {
         this.data.is_recommend = 1
       }
-      if (nav_item.goodsclass == 2) {
+      if (nav_item && nav_item.goodsclass == 2) {
         this.data.is_hot = 1
       }
-      if (nav_item.goodsclass == 3) {
+      if (nav_item && nav_item.goodsclass == 3) {
         this.data.is_new = 1
       }