var stop = true; // 防止重复请求数据
 $(window).scroll(function () {
     totalheight = parseInt($(window).height()) + parseInt($(window).scrollTop());
     if ($(document).height() <= totalheight) {
         if (stop == true) {
             stop = false;
             $.post("loadContent1.html", function (data) {
                 stop = true;
             }, "html");
         }
     }
 });