$(document).on("scroll", function () { //真實內容的高度 var pageHeight = Math.max(document.body.scrollHeight, document.body.offsetHeight); //視窗的高度 var viewportHeight = window.innerHeight || document.documentElement.clientHeight || document.body.clientHeight || 0; //隱藏的高度 var scrollHeight = window.pageYOffset || document.documentElement.scrollTop || document.body.scrollTop || 0; //判斷加載視頻，文章，回答，醫生 if(pageHeight - viewportHeight - scrollHeight <=0){  //事件 }});