diff --git a/static/aerbimJS.js b/static/aerbimJS.js
index 2efa9be..0dee678 100644
--- a/static/aerbimJS.js
+++ b/static/aerbimJS.js
@@ -646,7 +646,7 @@ $(window).scroll(function (){
                     $new_curtain = $curtain.clone()
                     $new_curtain.insertAfter($curtain)
                     let $new_curtain_tree = $new_curtain.find(".tree_documentation_container")
-                    $new_curtain_tree.css({height: 'calc(100vh - 245px);'})
+                    $new_curtain_tree.css({height: 'calc((100vh) - (245px))'})
                 }
                 if (scroll >= waitingTop && waitingTop){
                     $new_curtain.css({position:'fixed',top: 166,bottom:"unset"})