function fun(){    $(".productimg").each(function() {//遍历所有图片        var othis = $(this),//当前图片对象            top = othis.offset().top - $(window).scrollTop();//计算图片top - 滚动条top        if (top > $(window).height()) {//如果该图片不可见            return;//不管        } else {            othis.attr(‘src‘, othis.attr(‘data-src‘)).removeAttr(‘data-src‘);//可见的时候把占位值替换 并删除占位属性        }    });}fun();//$window.scroll(fn).resize(fn);//绑定事件$(window).bind("scroll",function(){fun();    // 判断窗口的滚动条是否接近页面底部    if( $(document).scrollTop() + $(window).height() > $(document).height() - 10 ) {$.ajax({ulr:"../mainpage/default.aspx",data:"id=1",dataType:"html",type:"post",success:function(data,status){var ss="";for(var i=0;i<2;i++){  ss+="<div class=‘divRow‘>";  for(var j=0;j<4;j++)  {    ss+="<a href=http://www.mamicode.com/‘../product/product.aspx‘ target=‘_blank‘>"         +"<div class=‘divMask‘></div>"                +"<div class=‘divToolTip‘>【包邮】华为荣耀3X</div>"                +"<div class=‘divProMsg‘>"                   +"<span class=‘spanPrice‘><b class=‘bFH‘>￥</b><b class=‘bY‘>30</b><b class=‘bSH‘>.99</b></span>"                   +"<span class=‘spanCX‘><span class=‘spanCXXX‘>5.0折</span> "                   +"<span class=‘spanYJ‘><strike>￥50.50</strike></span></span><span class=‘spanQG‘>546人已开抢</span>"                   +"<span class=‘spanQQG‘><b>去抢购</b></span></div></a>";  }  ss+="</div>"}$(".div_ajax").append(ss);},error: function(xmlHttp,status,msg){$(".div_ajax").html("append");}});

             <div class="div_ajax">                           <%for (int i = 0; i < RowCount; i++)                          { %>                        <div class="divRow">                            <%for (int j = 0; j < ColCount; j++)                              { %>                            <a href=‘../product/product.aspx‘ target=‘_blank‘>                                <img class=‘productimg‘ data-src=‘../image/05.jpg‘ src=‘http://s0.husor.cn/image/blank.png‘ alt=‘sadfsafsadff‘>                                <div class=‘divMask‘>                                </div>                                <div class=‘divToolTip‘>                                    【包邮】华为荣耀3X</div>                                <div class=‘divProMsg‘>                                    <span class=‘spanPrice‘><b class=‘bFH‘>￥</b> <b class=‘bY‘>30</b> <b class=‘bSH‘>.99</b>                                    </span><span class=‘spanCX‘><span class=‘spanCXXX‘>5.0折</span> <span class=‘spanYJ‘>                                        <strike>￥50.50</strike></span> </span><span class=‘spanQG‘>546人已开抢</span> <span class=‘spanQQG‘>                                            <b>去抢购</b></span>                                </div>                            </a>                            <%} %>                        </div>                        <div class=‘divFGX‘>                        </div>                        <%} %>                    </div>

.productimg{     width:100%;     height:220px;    border:0px;    margin-top:0px;    position:relative;    background:url(‘../image/loading.gif‘) no-repeat center center; }