js滚动加载插件

function $xhyload(o){
var that=this;
if(!o){
return;
}else{
that.win=$(o.config.obj);
that.qpanel=$(o.config.oPanel);
that.loadding=$(o.config.loadding);
}
that.config=$.extend({},this.config,o.config);
that.win.scrollTop(0,0);
that.win.bind("scroll",that,that.scrollHandler);

}
$xhyload.prototype={
config:{obj:window,delay:500,curPos:0,oriPos:0,isScrolling:false,marginBottom:100,oPanel:"#visitor_con",loadding:"#loadding",func:null},
scrollHandler:function(e){
var edata=e.data;cfg=edata.config;
cfg.curPos=edata.win.scrollTop();
if($(window).height() + $(window).scrollTop() >= $(document.body).height() - cfg.marginBottom){
if (cfg.isScrolling == true) return;
cfg.isScrolling = true;
setTimeout(function () { cfg.isScrolling = false; }, cfg.delay);
if (cfg.curPos - cfg.oriPos > 0) {
$(edata.loadding).show(); //加载提示
setTimeout(function(){
cfg.func(function(data){
edata.qpanel.append(data);
});
$(edata.loadding).hide();
},500)
}
}
cfg.oriPos=cfg.curPos;
},
}
$xhyload.prototype.constructor=$xhyload;

var visitor=new $xhyload({config:{obj:window,oPanel:"#visitor_con",loadding:"#loadding",delay:500,func:$ue_visitor}});

//===================================

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>demo</title>
<script src="1.9.js" type="text/javascript"></script>
<style type="text/css">
div#Loadding { text-align: center; margin-top: 10px; display: none; font-weight: bold; color:Red; }
div.content { width: 100%; height: 1200px; border-bottom: 1px solid gray; font-weight: bold; color:Red;text-align: center;}
</style>
<script type="text/javascript">
if (!NeuF) var NeuF = {};
NeuF.ScrollPage = function (obj, options, callback) {
var _defaultOptions = { delay: 500, marginBottom: 100 }; //默认配置：延迟时间delay和滚动条距离底部距离marginBottom
options = $.extend(_defaultOptions, options);
this.isScrolling = false; //是否在滚动
this.oriPos = 0; //原始位置
this.curPos = 0; //当前位置
var me = this; //顶层
var $obj = (typeof obj == "string") ? $("#" + obj) : $(obj);
//绑定滚动事件
$obj.scroll(function (ev) {
me.curPos = $obj.scrollTop();
if ($(window).height() + $(window).scrollTop() >= $(document.body).height() - options.marginBottom) {
if (me.isScrolling == true) return;
me.isScrolling = true;
setTimeout(function () { me.isScrolling = false;}, options.delay); //重复触发间隔毫秒;
if (typeof callback == "function") callback.call(null, me.curPos - me.oriPos);
};
me.oriPos = me.curPos;
});
};
$(function () {
window.scrollTo(0, 0); //每次F5刷新把滚动条置顶
//marginBottom表示滚动条离底部的距离，0表示滚动到最底部才加载，可以根据需要修改
new NeuF.ScrollPage(window, { delay: 1000, marginBottom: 0 }, function (offset) {
if (offset > 0) {
$("#Loadding").show(); //加载提示
setTimeout(function () {
//这里就是异步获取内容的地方，这里简化成一句话，可以根据需要修改
$("#divContainer").append($("<div class='content'>第“" + ($(".content").size() + 1) + "”页内容</div>"));
//内容获取后，隐藏加载提示
$("#Loadding").hide();
}, 1000);
}
});
});
</script>
</head>
<body>
<div id="divContainer">
<div class="content">
这里是内容，尝试滚动，加载下一页内容。如果是大屏幕显示器，<br />请把CSS div.content 高度调高，以便看到滚动效果 </div>
</div>
<div id="Loadding">
正在加载，请稍候 ...</div>
</body>
</html>