(function($){var slice=Array.prototype.slice;var splice=Array.prototype.splice;var defaults={topSpacing:0,bottomSpacing:0,className:'is-sticky',wrapperClassName:'sticky-wrapper',center:false,getWidthFrom:'',widthFromWrapper:true,responsiveWidth:false},$window=$(window),$document=$(document),sticked=[],windowHeight=$window.height(),scroller=function(){var scrollTop=$window.scrollTop(),documentHeight=$document.height(),dwh=documentHeight-windowHeight,extra=(scrollTop>dwh)?dwh-scrollTop:0;for(var i=0;i<sticked.length;i++){var s=sticked[i],elementTop=s.stickyWrapper.offset().top,etse=elementTop-s.topSpacing-extra;if(scrollTop<=etse){if(s.currentTop!==null){s.stickyElement.css({'width':'','position':'','top':''});s.stickyElement.parent().removeClass(s.className);s.stickyElement.trigger('sticky-end',[s]);s.currentTop=null;}}else{var newTop=documentHeight-s.stickyElement.outerHeight()-s.topSpacing-s.bottomSpacing-scrollTop-extra;if(newTop<0){newTop=newTop+s.topSpacing;}else{newTop=s.topSpacing;}if(s.currentTop!=newTop){var newWidth;if(s.getWidthFrom){newWidth=$(s.getWidthFrom).width()||null;}else if(s.widthFromWrapper){newWidth=s.stickyWrapper.width();}if(newWidth==null){newWidth=s.stickyElement.width();}s.stickyElement.css('width',newWidth).css('position','fixed').css('top',newTop);s.stickyElement.parent().addClass(s.className);if(s.currentTop===null){s.stickyElement.trigger('sticky-start',[s]);}else{s.stickyElement.trigger('sticky-update',[s]);}if(s.currentTop===s.topSpacing&&s.currentTop>newTop||s.currentTop===null&&newTop<s.topSpacing){s.stickyElement.trigger('sticky-bottom-reached',[s]);}else if(s.currentTop!==null&&newTop===s.topSpacing&&s.currentTop<newTop){s.stickyElement.trigger('sticky-bottom-unreached',[s]);}s.currentTop=newTop;}}}},resizer=function(){windowHeight=$window.height();for(var i=0;i<sticked.length;i++){var s=sticked[i];var newWidth=null;if(s.getWidthFrom){if(s.responsiveWidth===true){newWidth=$(s.getWidthFrom).width();}}else if(s.widthFromWrapper){newWidth=s.stickyWrapper.width();}if(newWidth!=null){s.stickyElement.css('width',newWidth);}}},methods={init:function(options){var o=$.extend({},defaults,options);return this.each(function(){var stickyElement=$(this);var stickyId=stickyElement.attr('id');var stickyHeight=stickyElement.outerHeight();var wrapperId=stickyId?stickyId+'-'+defaults.wrapperClassName:defaults.wrapperClassName
var wrapper=$('<div></div>').attr('id',wrapperId).addClass(o.wrapperClassName);stickyElement.wrapAll(wrapper);var stickyWrapper=stickyElement.parent();if(o.center){stickyWrapper.css({width:stickyElement.outerWidth(),marginLeft:"auto",marginRight:"auto"});}if(stickyElement.css("float")=="right"){stickyElement.css({"float":"none"}).parent().css({"float":"right"});}stickyWrapper.css('height',stickyHeight);o.stickyElement=stickyElement;o.stickyWrapper=stickyWrapper;o.currentTop=null;sticked.push(o);});},update:scroller,unstick:function(options){return this.each(function(){var that=this;var unstickyElement=$(that);var removeIdx=-1;var i=sticked.length;while(i-->0){if(sticked[i].stickyElement.get(0)===that){splice.call(sticked,i,1);removeIdx=i;}}if(removeIdx!=-1){unstickyElement.unwrap();unstickyElement.css({'width':'','position':'','top':'','float':''});}});}};if(window.addEventListener){window.addEventListener('scroll',scroller,false);window.addEventListener('resize',resizer,false);}else if(window.attachEvent){window.attachEvent('onscroll',scroller);window.attachEvent('onresize',resizer);}$.fn.sticky=function(method){if(methods[method]){return methods[method].apply(this,slice.call(arguments,1));}else if(typeof method==='object'||!method){return methods.init.apply(this,arguments);}else{$.error('Method '+method+' does not exist on jQuery.sticky');}};$.fn.unstick=function(method){if(methods[method]){return methods[method].apply(this,slice.call(arguments,1));}else if(typeof method==='object'||!method){return methods.unstick.apply(this,arguments);}else{$.error('Method '+method+' does not exist on jQuery.sticky');}};$(function(){setTimeout(scroller,0);});})(jQuery);