js/plugin/Scrollbar/jquery.mCustomScrollbar.js

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/* 
== malihu jquery custom scrollbars plugin == 
version: 2.3.2 
author: malihu (http://manos.malihu.gr) 
plugin home: http://manos.malihu.gr/jquery-custom-content-scroller 
*/
(function($){
	var methods={
		init:function(options){
			var defaults={ 
				set_width:false, /*optional element width: boolean, pixels, percentage*/
				set_height:false, /*optional element height: boolean, pixels, percentage*/
				horizontalScroll:false, /*scroll horizontally: boolean*/
				scrollInertia:550, /*scrolling inertia: integer (milliseconds)*/
				scrollEasing:"easeOutCirc", /*scrolling easing: string*/
				mouseWheel:"pixels", /*mousewheel support and velocity: boolean, "auto", integer, "pixels"*/
				mouseWheelPixels:60, /*mousewheel pixels amount: integer*/
				autoDraggerLength:true, /*auto-adjust scrollbar dragger length: boolean*/
				scrollButtons:{ /*scroll buttons*/
					enable:false, /*scroll buttons support: boolean*/
					scrollType:"continuous", /*scroll buttons scrolling type: "continuous", "pixels"*/
					scrollSpeed:20, /*scroll buttons continuous scrolling speed: integer*/
					scrollAmount:40 /*scroll buttons pixels scroll amount: integer (pixels)*/
				},
				advanced:{
					updateOnBrowserResize:true, /*update scrollbars on browser resize (for layouts based on percentages): boolean*/
					updateOnContentResize:false, /*auto-update scrollbars on content resize (for dynamic content): boolean*/
					autoExpandHorizontalScroll:false, /*auto-expand width for horizontal scrolling: boolean*/
					autoScrollOnFocus:true /*auto-scroll on focused elements: boolean*/
				},
				callbacks:{
					onScrollStart:function(){}, /*user custom callback function on scroll start event*/
					onScroll:function(){}, /*user custom callback function on scroll event*/
					onTotalScroll:function(){}, /*user custom callback function on scroll end reached event*/
					onTotalScrollBack:function(){}, /*user custom callback function on scroll begin reached event*/
					onTotalScrollOffset:0, /*scroll end reached offset: integer (pixels)*/
					whileScrolling:false, /*user custom callback function on scrolling event*/
					whileScrollingInterval:30 /*interval for calling whileScrolling callback: integer (milliseconds)*/
				}
			},
			options=$.extend(true,defaults,options);
			/*check for touch device*/
			$(document).data("mCS-is-touch-device",false);
			if(is_touch_device()){
				$(document).data("mCS-is-touch-device",true); 
			}
			function is_touch_device(){
				return !!("ontouchstart" in window) ? 1 : 0;
			}
			return this.each(function(){
				var $this=$(this);
				/*set element width/height, create markup for custom scrollbars, add classes*/
				if(options.set_width){
					$this.css("width",options.set_width);
				}
				if(options.set_height){
					$this.css("height",options.set_height);
				}
				if(!$(document).data("mCustomScrollbar-index")){
					$(document).data("mCustomScrollbar-index","1");