diff --git a/lib/util/ktutil.inc b/lib/util/ktutil.inc
index 4320d23..5f86ec2 100644
--- a/lib/util/ktutil.inc
+++ b/lib/util/ktutil.inc
@@ -7,32 +7,32 @@
  * KnowledgeTree Open Source Edition
  * Document Management Made Simple
  * Copyright (C) 2004 - 2007 The Jam Warehouse Software (Pty) Limited
- * 
+ *
  * This program is free software; you can redistribute it and/or modify it under
  * the terms of the GNU General Public License version 3 as published by the
  * Free Software Foundation.
- * 
+ *
  * This program is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
  * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
  * details.
- * 
+ *
  * You should have received a copy of the GNU General Public License
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- * 
+ *
  * You can contact The Jam Warehouse Software (Pty) Limited, Unit 1, Tramber Place,
  * Blake Street, Observatory, 7925 South Africa. or email info@knowledgetree.com.
- * 
+ *
  * The interactive user interfaces in modified source and object code versions
  * of this program must display Appropriate Legal Notices, as required under
  * Section 5 of the GNU General Public License version 3.
- * 
+ *
  * In accordance with Section 7(b) of the GNU General Public License version 3,
  * these Appropriate Legal Notices must retain the display of the "Powered by
- * KnowledgeTree" logo and retain the original copyright notice. If the display of the 
+ * KnowledgeTree" logo and retain the original copyright notice. If the display of the
  * logo is not reasonably feasible for technical reasons, the Appropriate Legal Notices
- * must display the words "Powered by KnowledgeTree" and retain the original 
- * copyright notice. 
+ * must display the words "Powered by KnowledgeTree" and retain the original
+ * copyright notice.
  * Contributor( s): ______________________________________
  */
 
@@ -117,17 +117,20 @@ class KTUtil {
 
     function strToBool ($sString, $null = false, $empty = false) {
         $sString = strtoupper($sString);
-        if ($sString == "Y") {
-            return true;
-        } elseif (($sString == "N")) {
-            return false;
-        } elseif (($sString == "ON")) {
-            return true;
-        } elseif (($sString == "OFF")) {
-            return false;
-        } elseif (($sString == "")) {
+        if (in_array($sString, array('Y','YES','ON','TRUE')))
+        {
+        	return true;
+        }
+        elseif (in_array($sString, array('N', 'NO','OFF','FALSE')))
+        {
+        	return false;
+        }
+		elseif ($sString == '')
+		{
             return $empty;
-        } else {
+        }
+        else
+        {
             return $null;
         }
     }