地图图片bug

@@ -265,8 +265,11 @@
     }
 
     .BMapLib_popup_close {
+        background-image: resolve("activity/trend/iw_close.gif");
+        background-repeat: no-repeat;
+        background-position: center center;
+        background-size: 100%;
         padding: 10px;
-        background: url("iw_close.gif") no-repeat center center transparent;
         border: 0 none;
         cursor: pointer;
         height: 13px;