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-rw-r--r--vorlesungen/stream/countdown.html40
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diff --git a/vorlesungen/stream/countdown.html b/vorlesungen/stream/countdown.html
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+<!DOCTYPE HTML>
+<html>
+<head>
+<style>
+p {
+text-align: center;
+font-size: 60px;
+}
+div {
+font-family: "Courier";
+text-align: center;
+font-size: 60px;
+color: #990000;
+}
+</style>
+</head>
+<body>
+<div id="demo"></div>
+<script>
+var deadline = new Date("May 17, 2021 17:00:00").getTime();
+var x = setInterval(function() {
+var now = new Date().getTime();
+var t = deadline - now;
+if (t > 0) {
+ var days = Math.floor(t / (1000 * 60 * 60 * 24));
+ var hours = Math.floor((t%(1000 * 60 * 60 * 24))/(1000 * 60 * 60));
+ var minutes = Math.floor((t % (1000 * 60 * 60)) / (1000 * 60));
+ var seconds = Math.floor((t % (1000 * 60)) / 1000);
+ document.getElementById("demo").innerHTML
+ = ("00" + minutes).slice(-2) + ":" + ("00" + seconds).slice(-2);
+} else {
+ document.getElementById("demo").innerHTML = "00:00";
+}
+}, 1000);
+
+</script>
+
+</body>
+</html>
+