Fix by alex3d, prevents overwriting _defaults

Author: trentrichardson

index.html

@@ -30,8 +30,8 @@
 		<link rel="stylesheet" media="all" type="text/css" href="http://code.jquery.com/ui/1.8.21/themes/ui-lightness/jquery-ui.css" />
 		<link rel="stylesheet" media="all" type="text/css" href="jquery-ui-timepicker-addon.css" />
 
-		<script type="text/javascript" src="http://code.jquery.com/jquery-1.7.2.min.js"></script>
-		<script type="text/javascript" src="http://code.jquery.com/ui/1.8.21/jquery-ui.min.js"></script>
+		<script type="text/javascript" src="http://code.jquery.com/jquery-1.8.0.min.js"></script>
+		<script type="text/javascript" src="http://code.jquery.com/ui/1.8.23/jquery-ui.min.js"></script>
 		<script type="text/javascript" src="jquery-ui-timepicker-addon.js"></script>
 		<script type="text/javascript" src="jquery-ui-sliderAccess.js"></script>
 		<script type="text/javascript">
@@ -139,6 +139,7 @@ <h2>Some Examples</h2>
 			<dt>T</dt><dd>A or P for AM/PM</dd>
 			<dt>tt</dt><dd>am or pm for AM/PM</dd>
 			<dt>TT</dt><dd>AM or PM for AM/PM</dd>
+			<dt>z</dt><dd>Timezone</dd>
 		</dl>
 		<p>Also related to your timeFormat, but not required, is the separator option</p>
 		<dl>

jquery-ui-timepicker-addon.js

@@ -1076,7 +1076,7 @@ $.datepicker.parseTime = function(timeFormat, timeString, options) {
 //########################################################################
 $.datepicker.formatTime = function(format, time, options) {
 	options = options || {};
-	options = $.extend($.timepicker._defaults, options);
+	options = $.extend({}, $.timepicker._defaults, options);
 	time = $.extend({hour:0, minute:0, second:0, millisec:0, timezone:'+0000'}, time);
 
 	var tmptime = format;