//文档的总高度function getScrollHeight(){　　var scrollHeight = 0, bodyScrollHeight = 0, documentScrollHeight = 0;　　if(document.body){　　　　bodyScrollHeight = document.body.scrollHeight;　　}　　if(document.documentElement){　　　　documentScrollHeight = document.documentElement.scrollHeight;　　}　　scrollHeight = (bodyScrollHeight - documentScrollHeight > 0) ? bodyScrollHeight : documentScrollHeight;　　return scrollHeight;}//浏览器视口的高度function getWindowHeight(){　　var windowHeight = 0;　　if(document.compatMode == "CSS1Compat"){　　　　windowHeight = document.documentElement.clientHeight;　　}else{　　　　windowHeight = document.body.clientHeight;　　}　　return windowHeight;}$(window).on(‘scroll‘, function(){    if ($(this).scrollTop() + getWindowHeight() == getScrollHeight()) {        $(‘#cardLoader‘).show();        $(window).off(‘scroll‘);    }});