(function ($) {
	$.fn.infinitescroll=function (options,callback) {
		function debug() {
			if(opts.debug) {
				window.console&&console.log.call(console,arguments)
			}
		}function areSelectorsValid(opts) {
			for(var key in opts) {
				if(key.indexOf&&key.indexOf("Selector")>-1&&$(opts[key]).length===0) {
					debug("Your "+key+" found no elements.");
					return false
				}return true
			}
		}function determinePath(path) {
			if(path.match(/^(.*?)\b2\b(.*?$)/)) {
				path=path.match(/^(.*?)\b2\b(.*?$)/).slice(1)
			}else {
				if(path.match(/^(.*?)2(.*?$)/)) {
					if(path.match(/^(.*?page=)2(\/.*|$)/)) {
						path=path.match(/^(.*?page=)2(\/.*|$)/).slice(1);
						return path
					}debug("Trying backup next selector parse technique. Treacherous waters here, matey.");
					path=path.match(/^(.*?)2(.*?$)/).slice(1)
				}else {
					if(path.match(/^(.*?page=)1(\/.*|$)/)) {
						path=path.match(/^(.*?page=)1(\/.*|$)/).slice(1);
						return path
					}if($.isFunction(opts.pathParse)) {
						return [path]
					}else {
						debug("Sorry, we couldn't parse your Next (Previous Posts) URL. Verify your the css selector points to the correct A tag. If you still get this error: yell, scream, and kindly ask for help at infinite-scroll.com.\r\n"+path);
						props.isInvalidPage=true
					}
				}
			}return path
		}function filterNav() {
			opts.isFiltered=true;
			return $(window).trigger("error.infscr."+opts.infid,[302])
		}function isNearBottom() {
			var pixelsFromWindowBottomToBottom=0+$(document).height()-($(props.container).scrollTop()||$(props.container.ownerDocument.body).scrollTop())-$(window).height()-1500;
			debug("math:",pixelsFromWindowBottomToBottom,props.pixelsFromNavToBottom);
			if(bixufanye==1)
			{
				bixufanye=0;
				return true;
			}
 			else if(document.readyState=="complete"&&(daodi==0))  
			{
				if(pixelsFromWindowBottomToBottom-opts.bufferPx<props.pixelsFromNavToBottom)
				{
					return true;
				}
				else 
					return false;
			}
			else
			{return false;}
		}function showDoneMsg() {
			props.loadingMsg.find("img").hide().parent().find("div").html(opts.donetext).animate({
				opacity:1
			},3000,function () {
				$(this).parent().fadeOut("normal")
			});
			opts.errorCallback()
		}function infscrSetup() {
			if(opts.isDuringAjax||opts.isInvalidPage||opts.isDone||opts.isFiltered||opts.isPaused) {
				return
			}if(!isNearBottom(opts,props)) {
				return
			}$(document).trigger("retrieve.infscr."+opts.infid)
		}function kickOffAjax() {
			opts.isDuringAjax=true;
			props.loadingMsg.appendTo(opts.loadMsgSelector).show(opts.loadingMsgRevealSpeed,function () {
				//$(opts.navSelector).hide();
				opts.currPage++;
				debug("heading into ajax",path);
				box=$(opts.contentSelector).is("table")?$("<tbody/>"):$("<div/>");
				frag=document.createDocumentFragment();
				if($.isFunction(opts.pathParse)) {
					desturl=opts.pathParse(path.join("2"),opts.currPage)
				}else {
					desturl=path.join(opts.currPage)
				}box.load(desturl+" "+opts.itemSelector,null,loadCallback)
			})
		}function loadCallback() {
			if(opts.isDone) {
				showDoneMsg();
				return false
			}else {
				var children=box.children();
				if(children.length==0||children.hasClass("error404")) {
					return $(window).trigger("error.infscr."+opts.infid,[404])
				}while(box[0].firstChild) {
					frag.appendChild(box[0].firstChild)
				}$(opts.contentSelector)[0].appendChild(frag);
				props.loadingMsg.fadeOut("normal");
				if(opts.animate) {
					var scrollTo=$(window).scrollTop()+$("#infscr-loading").height()+opts.extraScrollPx+"px";
					$("html,body").animate({
						scrollTop:scrollTo
					},800,function () {
						opts.isDuringAjax=false
					})
				}callback.call($(opts.contentSelector)[0],children.get());
				if(!opts.animate) {
					opts.isDuringAjax=false
				}
			}
		}function initPause(pauseValue) {
			if(pauseValue=="pause") {
				opts.isPaused=true
			}else {
				if(pauseValue=="resume") {
					opts.isPaused=false
				}else {
					opts.isPaused=!opts.isPaused
				}
			}debug("Paused: "+opts.isPaused);
			return false
		}function infscrError(xhr) {
			if(!opts.isDone&&xhr==404) {
				debug("Page not found. Self-destructing...");
				showDoneMsg();
				opts.isDone=true;
				opts.currPage=1;
				$(window).unbind("scroll.infscr."+opts.infid);
				$(document).unbind("retrieve.infscr."+opts.infid)
			}if(opts.isFiltered&&xhr==302) {
				debug("Filtered. Going to next instance...");
				opts.isDone=true;
				opts.currPage=1;
				opts.isPaused=false;
				$(window).unbind("scroll.infscr."+opts.infid,infscrSetup).unbind("pause.infscr."+opts.infid).unbind("filter.infscr."+opts.infid).unbind("error.infscr."+opts.infid);
				$(document).unbind("retrieve.infscr."+opts.infid,kickOffAjax)
			}
		}$.browser.ie6=$.browser.msie&&$.browser.version<7;
		var opts=$.extend({
		},$.infinitescroll.defaults,options),props=$.infinitescroll,box,frag,desturl,thisPause,errorStatus;
		callback=callback||function () {
		};
		if(!areSelectorsValid(opts)) {
			return false
		}props.container=document.documentElement;
		opts.contentSelector=opts.contentSelector||this;
		opts.loadMsgSelector=opts.loadMsgSelector||opts.contentSelector;
		var relurl=/(.*?\/\/).*?(\/.*)/,path=$(opts.nextSelector).attr("href");
		if(!path) {
			debug("Navigation selector not found");
			return
		}path=determinePath(path);
		props.pixelsFromNavToBottom=$(document).height()+(props.container==document.documentElement?0:$(props.container).offset().top)-$(opts.navSelector).offset().top;
		props.loadingMsg=$('<div id="infscr-loading" style="text-align: center;"><img alt="Loading..." src="'+opts.loadingImg+'" /><div>'+opts.loadingText+"</div></div>");
		(new Image()).src=opts.loadingImg;
		$(window).bind("scroll.infscr."+opts.infid,infscrSetup).bind("filter.infscr."+opts.infid,filterNav).bind("error.infscr."+opts.infid,function (event,errorStatus) {
			infscrError(errorStatus)
		}).bind("pause.infscr."+opts.infid,function (event,thisPause) {
			initPause(thisPause)
		}).trigger("scroll.infscr."+opts.infid);
		$(document).bind("retrieve.infscr."+opts.infid,kickOffAjax);
		return this
	};
	$.infinitescroll={
		defaults:{
			debug:false,preload:false,nextSelector:"div.navigation a:first",loadingImg:"http://www.infinite-scroll.com/loading.gif",loadingText:"<b> </b>",donetext:"<em>Congratulations, you've reached the end of the internet.</em>",navSelector:"div.navigation",contentSelector:null,loadMsgSelector:null,loadingMsgRevealSpeed:"normal",extraScrollPx:150,itemSelector:"div.post",animate:false,pathParse:undefined,bufferPx:100,errorCallback:function () {
			},infid:1,currPage:1,isDuringAjax:false,isInvalidPage:false,isFiltered:false,isDone:false,isPaused:false
		},loadingImg:undefined,loadingMsg:undefined,container:undefined,currDOMChunk:null
	}
})(jQuery);