/*

 Overscroll v1.4.8
 A jQuery Plugin that emulates the iPhone scrolling experience in a browser.
 http://azoffdesign.com/overscroll

 Intended for use with the latest jQuery
 http://code.jquery.com/jquery-latest.js

 Copyright 2011, Jonathan Azoff
 Dual licensed under the MIT or GPL Version 2 licenses.
 http://jquery.org/license

 For API documentation, see the README file
 https://github.com/azoff/Overscroll/blob/master/README.md

 Date: Sunday, September 25th 2011
*/
(function(l,n,e,c){c=e.fn.overscroll=function(a){a=a||{};return this.each(function(){c.init(e(this),a)})};e.fn.removeOverscroll=function(){return this.each(function(){var a=e(this).data(c.removerKey);e.isFunction(a)&&a()})};e.extend(c,{events:{wheel:"mousewheel DOMMouseScroll",start:"select mousedown touchstart",drag:"mousemove touchmove",end:"mouseup mouseleave touchend",ignored:"dragstart drag"},div:"<div/>",removerKey:"overscroll-remover",constants:{driftFrequency:40,driftSequences:22,driftDecay:1.15,
driftTimeout:100,timeout:400,captureThreshold:3,wheelDelta:20,scrollDelta:15,thumbThickness:6,thumbOpacity:0.7},init:function(a,b){var d={sizing:c.getSizing(a)};b=e.extend({showThumbs:true,wheelDirection:"vertical",cursor:"move",wheelDelta:c.constants.wheelDelta,scrollDelta:c.constants.scrollDelta,direction:"multi",cancelOn:""},b);if(b.direction!=="multi"&&b.direction!==b.wheelDirection)b.wheelDirection=b.direction;b.scrollDelta=n.abs(b.scrollDelta);b.wheelDelta=n.abs(b.wheelDelta);a.removeOverscroll();
a.data(c.removerKey,c.remover(a,d));a.css({position:"relative",overflow:"hidden",cursor:b.cursor}).bind(c.events.wheel,d,c.wheel).bind(c.events.start,d,c.start).bind(c.events.end,d,c.stop).bind(c.events.ignored,false);if(b.showThumbs){d.thumbs={};if(d.sizing.container.scrollWidth>0&&b.direction!=="vertical"){d.thumbs.horizontal=e(c.div).css(c.getThumbCss(d.sizing.thumbs.horizontal)).fadeTo(0,0);a.prepend(d.thumbs.horizontal)}if(d.sizing.container.scrollHeight>0&&b.direction!=="horizontal"){d.thumbs.vertical=
e(c.div).css(c.getThumbCss(d.sizing.thumbs.vertical)).fadeTo(0,0);a.prepend(d.thumbs.vertical)}}d.target=a;d.options=b;b.scrollLeft&&a.scrollLeft(b.scrollLeft);b.scrollTop&&a.scrollTop(b.scrollTop)},remover:function(a,b){return function(){a.css({overflow:"auto",cursor:"default"}).unbind(c.events.wheel,c.wheel).unbind(c.events.start,b,c.start).unbind(c.events.end,b,c.stop).unbind(c.events.ignored,false);if(b.thumbs){b.thumbs.horizontal&&b.thumbs.horizontal.remove();b.thumbs.vertical&&b.thumbs.vertical.remove()}}},
triggerEvent:function(a,b){b.target.trigger("overscroll:"+a)},toggleThumbs:function(a,b){if(a.thumbs)if(b){a.thumbs.vertical&&a.thumbs.vertical.stop(true,true).fadeTo("fast",c.constants.thumbOpacity);a.thumbs.horizontal&&a.thumbs.horizontal.stop(true,true).fadeTo("fast",c.constants.thumbOpacity)}else{a.thumbs.vertical&&a.thumbs.vertical.fadeTo("fast",0);a.thumbs.horizontal&&a.thumbs.horizontal.fadeTo("fast",0)}},setPosition:function(a,b,d){b.x=a.pageX;b.y=a.pageY;b.time=c.time();b.index=d;return b},
wheel:function(a,b){c.clearInterval(a.data.target);if(a.wheelDelta)b=a.wheelDelta/(l.opera?-120:120);if(a.detail)b=-a.detail/3;if(!a.data.wheelCapture){a.data.wheelCapture={timeout:null};c.toggleThumbs(a.data,true);a.data.target.stop(true,true).data("dragging",true)}b*=a.data.options.wheelDelta;if(a.data.options.wheelDirection==="horizontal")this.scrollLeft-=b;else this.scrollTop-=b;c.moveThumbs(a,this.scrollLeft,this.scrollTop);a.data.wheelCapture.timeout&&clearTimeout(a.data.wheelCapture.timeout);
a.data.wheelCapture.timeout=setTimeout(function(){a.data.wheelCapture=undefined;c.toggleThumbs(a.data,false);a.data.target.data("dragging",false)},c.constants.timeout)},moveThumbs:function(a,b,d,g,f,h,i){if(a.data.options.showThumbs){g=a.data.thumbs;f=a.data.sizing;if(g.horizontal){h=b*(1+f.container.width/f.container.scrollWidth);i=d+f.thumbs.horizontal.top;g.horizontal.css("margin",i+"px 0 0 "+h+"px")}if(g.vertical){h=b+f.thumbs.vertical.left;i=d*(1+f.container.height/f.container.scrollHeight);
g.vertical.css("margin",i+"px 0 0 "+h+"px")}}},start:function(a){c.clearInterval(a.data.target);a.data.startTarget=e(a.target);if(!a.data.startTarget.is(a.data.options.cancelOn)){c.normalizeEvent(a);a.data.target.bind(c.events.drag,a.data,c.drag).stop(true,true).data("dragging",false).data("dragged",false);a.data.position=c.setPosition(a,{});a.data.capture=c.setPosition(a,{},2);c.triggerEvent("dragstart",a.data)}},drag:function(a){c.normalizeEvent(a);a.data.target.data("dragged",true);a.data.target.data("dragging")||
c.toggleThumbs(a.data,true);if(a.data.options.direction!=="vertical")this.scrollLeft-=a.pageX-a.data.position.x;if(a.data.options.direction!=="horizontal")this.scrollTop-=a.pageY-a.data.position.y;c.moveThumbs(a,this.scrollLeft,this.scrollTop);c.setPosition(a,a.data.position);if(--a.data.capture.index<=0){a.data.target.data("dragging",true);c.setPosition(a,a.data.capture,c.constants.captureThreshold)}},normalizeEvent:function(a){var b;b=a.originalEvent;if(b.changedTouches){b=b.changedTouches;a.pageX=
b.pageX;a.pageY=b.pageY}},time:function(){return(new Date).getTime()},deferClick:function(a){var b=a.data("events");if(b&&b.click&&b.click.length){b=b.click.slice();a.unbind("click").one("click",function(d){d.preventDefault();e.each(b,function(g,f){a.click(f)})})}},stop:function(a){if(a.data.position){a.data.target.unbind(c.events.drag,c.drag);c.triggerEvent("dragend",a.data);a.data.target.data("dragging")?c.drift(this,a,function(b){b.target.data("dragging",false);c.toggleThumbs(b,false)}):c.toggleThumbs(a.data,
false);if(a.data.target.data("dragged")&&e(a.target).is(a.data.startTarget)){a.data.target.data("dragged",false);c.deferClick(a.data.startTarget);a.data.startTarget=null}a.data.capture=a.data.position=undefined}},clearInterval:function(a){a=e(a);var b=a.data("overscroll-interval");b&&l.clearInterval(b);a.data("overscroll-interval",null)},setInterval:function(a,b){c.clearInterval(a);e(a).data("overscroll-interval",b)},drift:function(a,b,d){if(c.time()-b.data.capture.time>c.constants.driftTimeout)return d.call(null,
b.data);c.normalizeEvent(b);var g=b.data.options.scrollDelta*(b.pageX-b.data.capture.x),f=b.data.options.scrollDelta*(b.pageY-b.data.capture.y),h=a.scrollLeft,i=a.scrollTop,j=g/c.constants.driftSequences,k=f/c.constants.driftSequences,o=c.constants.driftDecay;if(b.data.options.direction!=="vertical")h-=g;if(b.data.options.direction!=="horizontal")i-=f;c.triggerEvent("driftstart",b.data);c.setInterval(a,l.setInterval(function(){var m=true;if(k>1&&a.scrollTop>i||k<-1&&a.scrollTop<i){m=false;a.scrollTop-=
k;k/=o}if(j>1&&a.scrollLeft>h||j<-1&&a.scrollLeft<h){m=false;a.scrollLeft-=j;j/=o}c.moveThumbs(b,a.scrollLeft,a.scrollTop);if(m){c.clearInterval(a);c.triggerEvent("driftend",b.data);d.call(null,b.data)}},c.constants.driftFrequency))},getSizing:function(a){var b={},d=a.get(0);a=b.container={width:a.width(),height:a.height()};a.scrollWidth=a.width>=d.scrollWidth?a.width:d.scrollWidth;a.scrollHeight=a.height>=d.scrollHeight?a.height:d.scrollHeight;b.thumbs={horizontal:{width:a.width*a.width/a.scrollWidth,
height:c.constants.thumbThickness,corner:c.constants.thumbThickness/2,left:0,top:a.height-c.constants.thumbThickness},vertical:{width:c.constants.thumbThickness,height:a.height*a.height/a.scrollHeight,corner:c.constants.thumbThickness/2,left:a.width-c.constants.thumbThickness,top:0}};return b},getThumbCss:function(a){return{position:"absolute","background-color":"black",width:a.width+"px",height:a.height+"px",margin:a.top+"px 0 0 "+a.left+"px","-moz-border-radius":a.corner+"px","-webkit-border-radius":a.corner+
"px","border-radius":a.corner+"px","z-index":"999"}}})})(window,Math,jQuery);