diff --git a/s4-main.js b/s4-main.js
index 85e5773..9423fbc 100644
--- a/s4-main.js
+++ b/s4-main.js
@@ -425,7 +425,7 @@
 	box.appendChild(info);
 	iframe.src = url;
 
-	document.addEventListener("keydown", switchToByKey);
+	box.addEventListener("keydown", switchToByKey);
 	//box.addEventListener("click", (e) => {_resetPjax();});
 	bt.addEventListener("click", (e) => {_resetPjax();});
 	// dp.addEventListener("click", (e) => {_resetPjax();});