diff --git a/components/diy_notice/g_filter.wxs b/components/diy_notice/g_filter.wxs
index 4564e99..9be2a42 100644
--- a/components/diy_notice/g_filter.wxs
+++ b/components/diy_notice/g_filter.wxs
@@ -1,6 +1,7 @@
 var g_filters = {
 	has_char:function(url,key){
-	  return	url.indexOf(key);		
+	  if(!url)	return -1;
+	  return url.indexOf(key);		
 	}
 }
 module.exports = {