diff --git a/sbas/templates/sbas/exam_start.html b/sbas/templates/sbas/exam_start.html
index 9bb1dd8f..b6f5b803 100755
--- a/sbas/templates/sbas/exam_start.html
+++ b/sbas/templates/sbas/exam_start.html
@@ -10,8 +10,10 @@
 
 <script type="text/javascript">
     $(document).ready(function () {
+        $("button").click(() => {
         let cid = $("#cid-box").val();
         window.location.replace("{% url 'sbas:exam_take' pk=exam.pk sk=0 cid='0000000' %}".replace("0000000", cid));
+        });
     });
 </script>
 {% endblock %}