var page=1; //当前页的页码
var flagNoData = false;
var zhiwu_type,el_box

 function showAjax(){
           page += 1; 
            $.ajax({
               url:url,
               type:"POST",
               data: {page:page},
              success:function(data){
                   //要执行的内容
                   var content=JSON.parse(data)
                   console.log(content)
                   var str=''
                   content.map(i=>{
                     if(zhiwu_type=='zhiwudaquan'){
                       str+=`<li class="fl"><a href="${i.base_url}" title="${i.short_title}" >
                       <img src="${i.picture}" alt="">
                       <h3 class="diandian">${i.short_title}</h3>
                       <p class="duodiandian">${i.digest}</p>
                       </a></li>`
                     }else if(zhiwu_type=='yanghuazhishi'){
                       str+=`<li><a href="${i.base_url}" title="${i.short_title}" >
                       <img class="fl" src="${i.picture}" alt="">
                       <div class="fl">
                           <h3 class="duodaindian">${i.short_title}</h3>
                           <p class="duodiandian">${i.digest}</p>
                           <span>${i.showtime_str}</span>
                       </div>
                       </a></li>`
                     }else{
                       if(i.model_id==3){
                         str+=`<a class="new_zhiwu_index"  href="${i.base_url}">
                       <div class="left_img">
                         <img src="${i.picture}" alt="">
                         <span><img src="http://www.lianlianny.com/plantfarm/lib/mstatic/static/img/play.png" alt="">${i.length}</span>
                       </div>
                       <div>
                         <h3 class="duodiandian">${i.title}</h3>
                         <p class="">养花知识 ·  ${i.pv}万播放</p>
                       </div>
                     </a>`
                       }else{
                        str+=`<a class="new_zhiwu_index"  href="${i.base_url}">
                        <div class="left_img">
                          <img src="${i.picture}" alt="">
                        </div>
                        <div>
                          <h3 class="duodiandian">${i.title}</h3>
                          <p class="">养花知识 ·  ${i.pv}万播放</p>
                        </div>
                      </a>`
                       }
                       
                     }
                   })
                    if(el_box){
                      el_box.append(str)
                    }else{
                      $(".zhiwu_list_Box").append(str);
                    }
                    floimg();
            if(data==''){ 
               flagNoData = true;
            };
           }
            }) 
     //页数加1
}
showAjax();
function floimg() {
    $("img.lazyload").lazyload({
        effect: "fadeIn"
    });
}
function scrollFn() {
    //滚动条高度
    var scrollTop = 0;
    if(document.documentElement && document.documentElement.scrollTop) {
        scrollTop = document.documentElement.scrollTop;
    } else if(document.body) {
      scrollTop = document.body.scrollTop;
    }
  //视窗的高度
  var clientHeight = 0;
    if(document.body.clientHeight && document.documentElement.clientHeight) {
        clientHeight = Math.min(document.body.clientHeight, document.documentElement.clientHeight);
    } else {
        clientHeight = Math.max(document.body.clientHeight, document.documentElement.clientHeight);
    }
  //文档的高度
  var pageHeight = Math.max(document.body.scrollHeight, document.documentElement.scrollHeight);

  if (flagNoData) { //数据全部加载完了
    return;
  } else if (scrollTop + clientHeight >= pageHeight ) {
    showAjax();
  }
  
}
$(window).bind("scroll", scrollFn)