diff --git a/webapp/index.html b/webapp/index.html
index b28207b..a8c9cb3 100644
--- a/webapp/index.html
+++ b/webapp/index.html
@@ -10,9 +10,20 @@
 	<script type="text/javascript">
 		const api_url = window.location.protocol + "//" + window.location.hostname + ":" + window.location.port;
 
+		refresh_interval = register();
+
+		refresh();
+		document.addEventListener("visibilitychange", () => {
+			if (document.hidden) {
+				clearInterval(refresh_interval);
+			} else {
+				refresh();
+				refresh_interval = register();
+			}
+		});
+
 		function register() {
-			refresh();
-			setInterval(refresh, 15000);
+			return setInterval(refresh, 10000);
 		}
 
 		function flash() {
@@ -66,7 +77,7 @@
 	</script>
 </head>
 
-<body onload="register()"></body>
+<body></body>
 <button onclick="flash()">flash</button>
 <div id="info"></div>
 
