diff --git a/core/js/setup.js b/core/js/setup.js
index cb2995974510dc9484a435bbc57c1f0a7d993ab6..636e41fddea1160be92e91818f897039e98e3321 100644
--- a/core/js/setup.js
+++ b/core/js/setup.js
@@ -43,7 +43,8 @@ $(document).ready(function() {
 
 	$('input[checked]').trigger('click');
 
-	$('#showAdvanced').click(function() {
+	$('#showAdvanced').click(function(e) {
+		e.preventDefault();
 		$('#datadirContent').slideToggle(250);
 		$('#databaseBackend').slideToggle(250);
 		$('#databaseField').slideToggle(250);