exporting.js in highcharts-rails-4.2.0

- old
+ new

@@ -1,7 +1,7 @@
 /**
- * @license Highcharts JS v4.1.10 (2015-12-07)
+ * @license Highcharts JS v4.2.0 (2105-12-15)
  * Exporting module
  *
  * (c) 2010-2014 Torstein Honsi
  *
  * License: www.highcharts.com/license
@@ -15,11 +15,13 @@
         factory(Highcharts);
     }
 }(function (Highcharts) {
 
 // create shortcuts
-var Chart = Highcharts.Chart,
+var win = Highcharts.win,
+	doc = win.document,
+	Chart = Highcharts.Chart,
 	addEvent = Highcharts.addEvent,
 	removeEvent = Highcharts.removeEvent,
 	fireEvent = Highcharts.fireEvent,
 	createElement = Highcharts.createElement,
 	discardElement = Highcharts.discardElement,
@@ -28,12 +30,10 @@
 	each = Highcharts.each,
 	extend = Highcharts.extend,
 	splat = Highcharts.splat,
 	math = Math,
 	mathMax = math.max,
-	doc = document,
-	win = window,
 	isTouchDevice = Highcharts.isTouchDevice,
 	M = 'M',
 	L = 'L',
 	DIV = 'div',
 	HIDDEN = 'hidden',
@@ -537,12 +537,12 @@
 				clearTimeout(hideTimer);
 			});
 
 
 			// Hide it on clicking or touching outside the menu (#2258, #2335, #2407)
-			addEvent(document, 'mouseup', docMouseUpHandler);
+			addEvent(doc, 'mouseup', docMouseUpHandler);
 			addEvent(chart, 'destroy', function () {
-				removeEvent(document, 'mouseup', docMouseUpHandler);
+				removeEvent(doc, 'mouseup', docMouseUpHandler);
 			});
 
 
 			// create the items
 			each(items, function (item) {