diff --git a/frontend/web/assets/js/popo.js b/frontend/web/assets/js/popo.js
index ea8275c..93e65b4 100644
--- a/frontend/web/assets/js/popo.js
+++ b/frontend/web/assets/js/popo.js
@@ -21,8 +21,8 @@ $(function(){
             console.log(i);
             _that.addClass("unchoose");
             $(".model-bg").eq(i-1).removeClass("unchoose");
-            $('#side-menu .av').eq(arr[i]).addClass('boo');
-            $('#side-menu .av').eq(arr[i+1]).removeClass('boo');
+            $('#side-menu .av').eq(arr[i-1]).addClass('boo');
+            $('#side-menu .av').eq(arr[i]).removeClass('boo');
         });
     });