diff --git a/12/index.html b/12/index.html
index 9bf6a41..f5003d8 100644
--- a/12/index.html
+++ b/12/index.html
@@ -283,7 +283,7 @@
          
             document.querySelector("#implicancies_05 .etherpadlink").addEventListener("click",function(e){
                 console.log("click", e);
-              	document.querySelector("#implicancies_05 .etherpad_iframe").parentNode.classList.toggle("hidden");
+              	document.querySelector("#implicancies_05 .etherpad_iframe").classList.toggle("hidden");
               	if(iframe_loaded){
                 	console.log("preventDefault")
                 	e.preventDefault()