+function($) {
	"use strict";
	$.fn.scrollheight = function(){
		return this[0].scrollheight
	};
	var getoffset = function(container) {
			var tagname = container[0].tagname.touppercase();
			var scrolltop;
			if (tagname === 'body' || tagname === 'html') {
				scrolltop = container.scrolltop() || $(window).scrolltop()
			} else {
				scrolltop = container.scrolltop()
			};
			var offset = container.scrollheight() - ($(window).height() + scrolltop);
			return offset
		};
	var infinite = function(el, distance) {
			this.container = $(el);
			this.container.data("infinite", this);
			this.distance = distance || 50;
			this.attachevents()
		};
	infinite.prototype.scroll = function() {
		var container = this.container;
		this._check()
	};
	infinite.prototype.attachevents = function(off) {
		var el = this.container;
		var scrollcontainer = (el[0].tagname.touppercase() === "body" ? $(document) : el);
		scrollcontainer[off ? "off" : "on"]("scroll", $.proxy(this.scroll, this))
	};
	infinite.prototype.detachevents = function(off) {
		this.attachevents(true)
	};
	infinite.prototype._check = function() {
		if($(".loadmore").hasclass("end"))return false;
		var offset = getoffset(this.container);
		if (offset < 0 && math.abs(offset) >= this.distance) { //往下拉
			$(".loadmore").removeclass("end").addclass("show");
			this.container.trigger("infinite");
			return false;
		}
	};
	var infinite = function(el) {
			if($(".loadmore").hasclass("end"))return false;
			attachevents(el)
		};
	$.fn.infinite = function(distance) {
		return this.each(function() {
			new infinite(this, distance)
		})
	};
	$.fn.destroyinfinite = function() {
		return this.each(function() {
			var infinite = $(this).data("infinite");
			if (infinite && infinite.detachevents) infinite.detachevents()
		})
	}
}($);
jquery.extend({
	left:function(mainstr,lnglen) { 
		if (mainstr&&lnglen>0)return mainstr.substring(0,lnglen);
		return '';
	},
	right:function(mainstr,lnglen) { 
		if (mainstr.length-lnglen>=0 && mainstr.length>=0 && mainstr.length-lnglen<=mainstr.length)return mainstr.substring(mainstr.length-lnglen,mainstr.length);
		return '';
	},
	mid:function(mainstr,starnum,endnum){ 
		if (mainstr.length>=0)return mainstr.substr(starnum,endnum);
		return '';
	},
	cookie:function(a, b, c) {
		//example $.cookie('name','value',{expires:7,path:'/',domain:'jquery.com',secure:true});
		if (typeof b != 'undefined') {
			c = c || {};
			if (b === null) {
				b = '';
				c = $.extend({}, c);
				c.expires = -1
			}
			var d = '';
			if (c.expires && (typeof c.expires == 'number' || c.expires.toutcstring)) {
				var e;
				if (typeof c.expires == 'number') {
					e = new date();
					e.settime(e.gettime() + (c.expires * 24 * 60 * 60 * 1000))
				} else {
					e = c.expires
				}
				d = '; expires=' + e.toutcstring()
			}
			var f = c.path ? ';path=' + (c.path) : ';path=/';
			var g = c.domain ? '; domain=' + (c.domain) : '';
			var h = c.secure ? '; secure' : '';
			document.cookie = [a, '=', encodeuricomponent(escape(b)), d, f, g, h].join('')
		} else {
			var j = null;
			if (document.cookie && document.cookie != '') {
				var k = document.cookie.split(';');
				for (var i = 0; i < k.length; i++) {
					var l = jquery.trim(k[i]);
					if (l.substring(0, a.length + 1) == (a + '=')) {
						j = unescape(decodeuricomponent(l.substring(a.length + 1)));
						break
					}
				}
			}
			return j
		}
	},
	getnum:function(s,len){	// 字符串强制转换为数字，len=小数点后面长度
		s=$.trim(s);
		if(!s)return 0;
		if(!number(s))return 0;
		if(len)s=s.tofixed(len);
		return parsefloat(s);
	},
	get_value:function(dom){
		if(!dom)return;dom='[name="'+dom+'"]:not(:disabled)';
		if($(dom).length==0)return "";
		var str="",type=$(dom).get(0).type,inputname=$(dom).get(0).tagname,sclass=$(dom+':first').attr("class");
		type=type?type.tolowercase():"";
		inputname=inputname?inputname.tolowercase():"";
		if(type=="checkbox"){
			dom=dom.replace(/\#/gi,"").replace(/\./,"");
			$('input'+dom+':checked').each(function(x){
				str+=$(this).val()+',';
			});
			str=jquery.trim(str);
			if (str.length-1>=0 && str.length>=0 && str.length-1<=str.length&&str.substring(str.length-1,str.length)==',')str=str.substring(0,str.length-1);
		}else if(type=="radio"){
			str=$(dom+":checked").val();
			str=jquery.trim(str);
		}else{
			dom=dom.replace(/\#/gi,"").replace(/\./,"");
			$(inputname+dom).each(function(x){
				if($(this).val())str+=$(this).val()+',';
			});
			str=jquery.trim(str);
			if (str.length-1>=0 && str.length>=0 && str.length-1<=str.length&&str.substring(str.length-1,str.length)==',')str=str.substring(0,str.length-1);
		};
		return $.trim(str);
	},
	querystring:function(name) { 
		var reg = new regexp("(^|&)" + name + "=([^&]*)(&|$)", "i"); 
		var r = window.location.search.substr(1).match(reg); 
		if (r != null) return unescape(r[2]);
		return null; 
	},
	clearhtml:function(str){
		return str.replace(/<(?:.|\s)*?>/g,"");
	},
	fornumber:function(num) {//格式化数字成两位小数
		num = num.tostring().replace(/\$|\,/g,'');
		if(isnan(num))
			num = "0";
		sign = (num == (num = math.abs(num)));
		num = math.floor(num*100+0.50000000001);
		cents = num%100;
		num = math.floor(num/100).tostring();
		if(cents<10)
		cents = "0" + cents;
		for (var i = 0; i < math.floor((num.length-(1+i))/3); i++)
		num = num.substring(0,num.length-(4*i+3))+','+
		num.substring(num.length-(4*i+3));
		return (((sign)?'':'-') + num + '.' + cents);
	}
});

var han={},		// 通用
	prvstudy=0,	// 上次学习的进度
	page=1,		// 起始页码
	allpage=0,	// 所有页数
	index=1,	// 当前位置
	load_close=function(){// 关闭load
		$(".load").removeclass("show");
	},
	load=function(str){
		load_close();
		str=str?str:"";
		$(".load").addclass("show").find("p").html(str);
	},
	alert_close=function(){
		$("#alert").removeclass("show");
	},
	get=function(data,callback){
		$.ajax({
			type:"get",
			beforesend:function(){$(".loadmore").addclass("show");},
			url:"/ajax/ajax_get.html",
			datatype:"json",
			data:data,
			success:function(result){
				if(callback){
					callback(result)
				}else{
					load_close();
				};
				$(".loadmore").removeclass("show");
			}
		});
	};
han.alert=function(info,title,callback){
	alert_close();
	if(typeof title=="function"){
		callback=title;
		title="";
	};
	title=title?title:"提示";
	$("#alert .alert_title").html(title);
	$("#alert .alert_content").html(info);
	$("#alert a").removeclass("hide");
	$("#alert .cancle").addclass("hide");
	$("#alert").addclass("show").find("a.sure").unbind().bind("click",function(){
		if(callback){
			callback(true);
			alert_close();
		}else{
			alert_close();
		};
	});
};
han.confirm=function(info,title,sure,cancle){
	alert_close();
	if(typeof title=="function"){
		if(sure){
			cancle=sure;
			sure=title;
			title="";
		}else{
			sure=title;
			title="";
		};
	};
	title=title?title:"提示";
	$("#alert .alert_title").html(title);
	$("#alert .alert_content").html(info);
	$("#alert a").removeclass("hide");
	$("#alert").addclass("show").find("a.sure").unbind().bind("click",function(){
		if(sure){
			sure(true);
			alert_close();
		}else{
			alert_close();
		};
	});
	$("#alert").find("a.cancle").unbind().bind("click",function(){
		if(cancle){
			cancle(false);
			alert_close();
		}else{
			alert_close();
		};
	});
};