弹出窗口图片不会更改问题

Question

我正在尝试在弹出窗口下创建弹出窗口但是当我尝试添加任何东西代替图像时它不显示旧图像出现。甚至关闭链接也无法正常工作。任何人都知道为什么会这样 下面是我的代码

＆＃13;

＆＃13;

// Get the modal
var modal = document.getElementById('myModal');

// Get the button that opens the modal
var btn = document.getElementById("myBtn");

// Get the <span> element that closes the modal
var span = document.getElementsByClassName("close")[0];

// When the user clicks the button, open the modal
btn.onclick = function() {
  modal.style.display = "block";
}

// When the user clicks on <span> (x), close the modal
span.onclick = function() {
  modal.style.display = "none";
}

// When the user clicks anywhere outside of the modal, close it
window.onclick = function(event) {
  if (event.target == modal) {
    modal.style.display = "none";
  }
}

// Get the modal
var modal = document.getElementById('myModal');

// Get the button that opens the modal
var btn = document.getElementById("myBtn2");

// Get the <span> element that closes the modal
var span = document.getElementsByClassName("close")[0];


// When the user clicks the button, open the modal
btn.onclick = function() {
  modal.style.display = "block";
}

// When the user clicks on <span> (x), close the modal
span.onclick = function() {
  modal.style.display = "none";
}

// When the user clicks anywhere outside of the modal, close it
window.onclick = function(event) {
  if (event.target == modal) {
    modal.style.display = "none";
  }
}

＆＃13;

/* The Modal (background) */

.modal {
  display: none;
  /* Hidden by default */
  position: fixed;
  /* Stay in place */
  z-index: 1;
  /* Sit on top */
  padding-top: 100px;
  /* Location of the box */
  left: 0;
  top: 0;
  width: 100%;
  /* Full width */
  height: 100%;
  /* Full height */
  overflow: auto;
  /* Enable scroll if needed */
  background-color: rgb(0, 0, 0);
  /* Fallback color */
  background-color: rgba(0, 0, 0, 0.4);
  /* Black w/ opacity */
}
/* Modal Content */

.modal-content {
  background-color: #fefefe;
  margin: auto;
  padding: 20px;
  border: 1px solid #888;
  width: 80%;
}
/* The Close Button */

.close {
  color: #aaaaaa;
  float: right;
  font-size: 28px;
  font-weight: bold;
}
.close:hover,
.close:focus {
  color: #000;
  text-decoration: none;
  cursor: pointer;
}
#thumbwrap {
  margin: 75px auto;
  width: 1190px;
  height: 1190px;
}
.thumb {
  float: left;
  /* must be floated for same cross browser position of larger image */
  /* position:relative;*/
  margin: 3px;
}
.thumb img {
  border: 1px solid #000;
  vertical-align: bottom;
}
.thumb:focus {
  border: 0;
  /* IE6 needs this to show large image */
  z-index: 1;
}
.thumb span {
  position: absolute;
  visibility: hidden;
  width: 70%;
  height: 50%;
  background: grey;
}
.thumb:focus span {
  visibility: visible;
  top: 130px;
  left: 100px;
}
.thumb .x {
  position: absolute;
  top: -11px;
  z-index: 1101;
  margin: 0px;
}

＆＃13;

<h2>Modal Example</h2>

<!-- Trigger/Open The Modal -->
<img id="myBtn" src="http://www.websitecodetutorials.com/code/images/jamie-small1.jpg">

<!-- The Modal -->
<div id="myModal" class="modal">

  <!-- Modal content -->
  <div class="modal-content">
    <span class="close">×</span>
    <p>Some text in the Modal..</p>
    <div id="thumbwrap">
      <a class="thumb" href="#">
        <img src="http://www.websitecodetutorials.com/code/images/jamie-small1.jpg" alt=""><span><img src="http://www.websitecodetutorials.com/code/images/jamie-small1.jpg" alt="">jhkjgvfhgcgbfxfdzds\dCS</span>
      </a>
      <a class="thumb" href="#">
        <img src="http://www.websitecodetutorials.com/code/images/jamie-small1.jpg" alt=""><span><img src="http://www.websitecodetutorials.com/code/images/jamie-small1.jpg" alt=""></span>
      </a>
      <a class="thumb" href="#">
        <img src="http://www.websitecodetutorials.com/code/images/jamie-small1.jpg" alt=""><span><img src="http://www.websitecodetutorials.com/code/images/jamie-small1.jpg" alt=""></span>
      </a>
      <a class="thumb" href="#">
        <img src="http://www.websitecodetutorials.com/code/images/jamie-small1.jpg" alt=""><span><img src="http://www.websitecodetutorials.com/code/images/jamie-small1.jpg" alt=""></span>
      </a>
      <a class="thumb" href="#">
        <img src="http://www.websitecodetutorials.com/code/images/jamie-small1.jpg" alt=""><span><img src="http://www.websitecodetutorials.com/code/images/jamie-small1.jpg" alt=""></span>
      </a>
      <a class="thumb" href="#">
        <img src="http://www.websitecodetutorials.com/code/images/jamie-small1.jpg" alt=""><span><img src="http://www.websitecodetutorials.com/code/images/jamie-small1.jpg" alt=""></span>
      </a>
      <a class="thumb" href="#">
        <img src="http://www.websitecodetutorials.com/code/images/jamie-small1.jpg" alt=""><span><img src="http://www.websitecodetutorials.com/code/images/jamie-small1.jpg" alt=""></span>
      </a>
      <a class="thumb" href="#">
        <img src="http://www.websitecodetutorials.com/code/images/jamie-small1.jpg" alt=""><span><img src="http://www.websitecodetutorials.com/code/images/jamie-small1.jpg" alt=""></span>
      </a>
      <a class="thumb" href="#">
        <img src="http://www.websitecodetutorials.com/code/images/jamie-small1.jpg" alt=""><span><img src="http://www.websitecodetutorials.com/code/images/jamie-small1.jpg" alt=""></span>
      </a>
    </div>

  </div>

</div>

<h2>Modal Example</h2>

<!-- Trigger/Open The Modal -->
<img id="myBtn2" src="http://www.websitecodetutorials.com/code/images/jamie-small1.jpg">

<!-- The Modal -->
<div id="myModal" class="modal">

  <!-- Modal content -->
  <div class="modal-content">
    <span class="close">×</span>
    <p>Some text in the Modal..</p>
    <div id="thumbwrap">
      <a class="thumb" href="#">
        <img src="http://www.websitecodetutorials.com/code/images/jamie-.jpg" alt=""><span><iframe width="560" height="315" src="https://www.youtube.com/embed/QjzbjHREC7k" frameborder="0" allowfullscreen></iframe>jhkjgvfhgcgbfxfdzds\dCS<a class="x" href="#thumbwrap" data-rel="back" style="display:block;">Close</a></span> 
      </a>
      <a class="thumb" href="#">
        <img src="http://www.websitecodetutorials.com/code/images/jamie-small1.jpg" alt=""><span><img src="http://www.websitecodetutorials.com/code/images/jamie-small1.jpg" alt=""></span>
      </a>
      <a class="thumb" href="#">
        <img src="http://www.websitecodetutorials.com/code/images/jamie-small1.jpg" alt=""><span><img src="http://www.websitecodetutorials.com/code/images/jamie-small1.jpg" alt=""></span>
      </a>
      <a class="thumb" href="#">
        <img src="http://www.websitecodetutorials.com/code/images/jamie-small1.jpg" alt=""><span><img src="http://www.websitecodetutorials.com/code/images/jamie-small1.jpg" alt=""></span>
      </a>
      <a class="thumb" href="#">
        <img src="http://www.websitecodetutorials.com/code/images/jamie-small1.jpg" alt=""><span><img src="http://www.websitecodetutorials.com/code/images/jamie-small1.jpg" alt=""></span>
      </a>
      <a class="thumb" href="#">
        <img src="http://www.websitecodetutorials.com/code/images/jamie-small1.jpg" alt=""><span><img src="http://www.websitecodetutorials.com/code/images/jamie-small1.jpg" alt=""></span>
      </a>
      <a class="thumb" href="#">
        <img src="http://www.websitecodetutorials.com/code/images/jamie-small1.jpg" alt=""><span><img src="http://www.websitecodetutorials.com/code/images/jamie-small1.jpg" alt=""></span>
      </a>
      <a class="thumb" href="#">
        <img src="http://www.websitecodetutorials.com/code/images/jamie-small1.jpg" alt=""><span><img src="http://www.websitecodetutorials.com/code/images/jamie-small1.jpg" alt=""></span>
      </a>
      <a class="thumb" href="#">
        <img src="http://www.websitecodetutorials.com/code/images/jamie-small1.jpg" alt=""><span><img src="http://www.websitecodetutorials.com/code/images/jamie-small1.jpg" alt=""></span>
      </a>
    </div>

  </div>

</div>

＆＃13;

＆＃13;

＆＃13;