diff --git a/theme/index.hbs b/theme/index.hbs
index 9a78874..c70ca66 100755
--- a/theme/index.hbs
+++ b/theme/index.hbs
@@ -97,7 +97,6 @@
                 {{{ content }}}
             </div>
 
-            <!--
             <mdui-dialog headline="Study Env (press esc to close)" close-on-esc id="study-env-dialog">
                 <iframe src="about:blank" style="height:80%;width:99%" id="study-env-iframe"></iframe>
             </mdui-dialog>
@@ -107,7 +106,7 @@
                     document.getElementById("study-env-dialog").open = true
                     document.getElementById("study-env-iframe").src = "http://jslinux.cxykevin.top"
                 });
-            </script>-->
+            </script>
 
             <div style="height:10em;margin-top:2em;margin-left:2em;margin-right:2em;display:flex">
                 {{#previous}}