wap 往下拉自动加载更多数据

var stop=true;
		$(window).scroll(function(){
			totalheight = parseFloat($(window).height()) + parseFloat($(window).scrollTop());
			if($(document).height() <= totalheight){
				if(stop==true){
					stop=false;
					$.post("http://www.lovexm.com/test.php", {start:1, n:50},function(txt){
						$("#pro-list-li").after(txt);
						stop=true;
					},"text");
				}
			}
		});