jQuery はページ データとイベント委任を動的に追加します

<p id = "container">
<h1> Photo Gallery</h1>

<p id = "gallery">
  <p class = "photo">
    <img src = "./images/1.jpg">
    <p class = "details">
      <p class = "description">The Cullin Mountains, Isle of skye ....</p>
      <p class = "date">12/24/2000</p>
      <p class = "photographer"> Alasdair Dougall</p>
    </p>
  </p>

  <p class = "photo">
    <img src = "./images/2.jpg">
    <p class = "details">
      <p class = "description">The Cullin Mountains, Isle of skye.... </p>
      <p class = "date">12/24/2000</p>
      <p class = "photographer"> Alasdair Dougall</p>
    </p>
  </p>

    <p class = "photo">
    <img src = "./images/3.jpg">
    <p class = "details">
      <p class = "description">The Cullin Mountains, Isle of skye.... </p>
      <p class = "date">12/24/2000</p>
      <p class = "photographer"> Alasdair Dougall</p>
    </p>
  </p>
//若干图片

</p>

 <p class = "link"><a id = "more-photos" href = "1.html"> More Photos >></a></p> 
</p>

<p class = "photo">
    <img src = "./images/1.jpg">
    <p class = "details">
      <p class = "description">The Cullin Mountains, Isle of skye </p>
      <p class = "date">12/24/2000</p>
      <p class = "photographer"> Alasdair Dougall</p>
    </p>
  </p>

  <p class = "photo">
    <img src = "./images/2.jpg">
    <p class = "details">
      <p class = "description">The Cullin Mountains, Isle of skye </p>
      <p class = "date">12/24/2000</p>
      <p class = "photographer"> Alasdair Dougall</p>
    </p>
  </p>

    <p class = "photo">
    <img src = "./images/3.jpg">
    <p class = "details">
      <p class = "description">The Cullin Mountains, Isle of skye </p>
      <p class = "date">12/24/2000</p>
      <p class = "photographer"> Alasdair Dougall</p>
    </p>
  </p>

    <p class = "photo">
    <img src = "./images/4.jpg">
    <p class = "details">
      <p class = "description">The Cullin Mountains, Isle of skye </p>
      <p class = "date">12/24/2000</p>
      <p class = "photographer"> Alasdair Dougall</p>
    </p>
  </p>

    <p class = "photo">
    <img src = "./images/5.jpg">
    <p class = "details">
      <p class = "description">The Cullin Mountains, Isle of skye </p>
      <p class = "date">12/24/2000</p>
      <p class = "photographer"> Alasdair Dougall</p>
    </p>
  </p>

    <p class = "photo">
    <img src = "./images/6.jpg">
    <p class = "details">
      <p class = "description">The Cullin Mountains, Isle of skye </p>
      <p class = "date">12/24/2000</p>
      <p class = "photographer"> Alasdair Dougall</p>
    </p>
  </p>

<script>
  $(document).ready(function(){
  //首先定义一个变量来记录当前是多少页
    var pageNum = 1;

    //给链接添加点击事件
    $("#more-photos").click(function(event){
      event.preventDefault();
      var $link = $(this);

      //获得当前所点链接的url
      var url = $link.attr(&#39;href&#39;);

      //如果该链接的url存在，进行页面追加
      if(url){
        $.get(url, function(data){
          $("#gallery").append(data);
        });

    pageNum ++;
  //总共有十个片段要追加，名称分别为1.html,2.html ...10.html
    当当前页面的总数小于总数时，进行链接更新。
    if(pageNum < 10){
      $link.attr(&#39;href&#39;, &#39;./&#39;+pageNum+&#39;.html&#39;);
        }

    //当将所有片段追加完成后，移除链接。
      else{
        $link.remove();
      }
      }
    })
  });

$(document).ready(function(){
    $('p .photo').hover(function(){
      $(this).find('.details').fadeTo('slow', 0.7);
    },function(){
        $(this).find('.details').fadeOut('slow');
    })
  });

$(document).ready(function(){
  $('p.photo').on('mouseenter mouseleave', 
      function(event){
      var $details = $(this).find('.details');
      if(event.type == 'mouseenter'){
        $details.fadeTo('slow', 0.7);
        //0.7代表的是透明度
      }
      else{
        $details.fadeOut('slow');
      }
    })
});

$(document).ready(function(){
    $('#gallery').on('mouseenter mouseleave', 'p.photo', function(event){

      var $details = $(this).find('.details');
      if(event.type == 'mouseenter'){
        $details.fadeTo('slow', 0.7);
      }
      else{
        $details.fadeOut('slow');
      }
    })
  })