move qrcode variable out of function

index.html

@@ -20,8 +20,9 @@
 	<script type="text/javascript" src="js/qrcode.min.js"></script>
 
 	<script type="text/javascript">
+	var qrcode;
 	function generateQR() {
-		var qrcode = new QRCode(document.getElementById("qrcode"), location.hash.substring(1));
+		qrcode = new QRCode(document.getElementById("qrcode"), location.hash.substring(1));
 	}
 	$( document ).ready(function() {
 		generateQR();