diff --git a/core/dom/dom.ui.js b/core/dom/dom.ui.js
index 44ae6a101b..343994b4e4 100644
--- a/core/dom/dom.ui.js
+++ b/core/dom/dom.ui.js
@@ -77,7 +77,20 @@ NodeList.prototype.unseen = function() {
   }
   return this
 }
-
+Element.prototype.toggle = function() {
+  if (this.offsetParent === null){
+    this.style.display = ''
+  } else {
+    this.style.display = 'none'
+  }
+  return this
+}
+NodeList.prototype.toggle = function() {
+  for (var idx = 0; idx < this.length; idx++) {
+    this[idx].toggle()
+  }
+  return this
+}
 Element.prototype.empty = function() {
   while (this.firstChild) {
     this.removeChild(this.lastChild)
diff --git a/core/php/utils.inc.php b/core/php/utils.inc.php
index c113fcf7d0..a786c0d20e 100644
--- a/core/php/utils.inc.php
+++ b/core/php/utils.inc.php
@@ -254,9 +254,9 @@ function mySqlIsHere() {
 
 function displayException($e) {
 	$message = '<span id="span_errorMessage">' . $e->getMessage() . '</span>';
-	if (DEBUG) {
-		$message .= '<a class="pull-right bt_errorShowTrace cursor">Show traces</a>';
-		$message .= '<br/><pre class="pre_errorTrace" style="display : none;">' . print_r($e->getTrace(), true) . '</pre>';
+	if (DEBUG !== 0) {
+		$message .= "<a class=\"pull-right bt_errorShowTrace cursor\" onclick=\"event.stopPropagation(); document.getElementById('pre_errorTrace').toggle()\">Show traces</a>";
+		$message .= '<br/><pre id="pre_errorTrace" style="display : none;">' . print_r($e->getTraceAsString(), true) . '</pre>';
 	}
 	return $message;
 }
diff --git a/sick.php b/sick.php
index 6855776dc6..83725699c7 100644
--- a/sick.php
+++ b/sick.php
@@ -75,7 +75,7 @@
 		$user->save();
 		echo "OK (admin/admin)\n";
 	}
-} catch (Exeption $e) {
+} catch (Exception $e) {
 	echo "ERROR\n";
 	echo "Description : " . $e->getMessage();
 	echo "\n";