不知道爲什麼我的模式不會彈出頁面加載

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我開始編寫愛好。我似乎無法讓我的模式彈出頁面加載。我打開一個空白文檔，它加載得很好。嘗試將其加載到我的朋友主頁上，但沒有任何反應。我正在使用Dreamweaver CC。不知道爲什麼我的模式不會彈出頁面加載

HTML：

<!-- The Modal --> 
<div id="myModal" class="modal"> 
    <!-- Modal content --> 
    <div class="modal-content"> 
     <div class="modal-header"> 
      <span class="close">&times;</span> 
      <h2>Update</h2> 
     </div> 
     <div class="modal-body"> 
      <h3>Hello, we regret to inform you that we are closed today due to  currently upgrading our systems. We are working diligently on this matter. We want to continue to try and provide a fast and easy system for patients to be able to place their order. As always taking care of our patients and those in our community is our highest priority. We want to thank you for your loyalty and patience and we will try to resume business as quickly as possible. </h3> 
      <h3>To stay updated with our current status and menu options follow us on Facebook.com/TheHumbleRoot and Instagram @humble_root. </h3> 
     </div> 
     <div class="modal-footer"> 
      <h3>We thank you for your patience</h3> 
     </div> 
    </div> 
</div>

CSS：

/* The Modal (background) */ 

.modal { 
    display: block; 
    /* 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 { 
    position: relative; 
    background-color: #fefefe; 
    margin: auto; 
    padding: 0; 
    border: 1px solid #888; 
    width: 80%; 
    box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.2), 0 6px 20px 0 rgba(0, 0, 0, 0.19); 
    -webkit-animation-name: animatetop; 
    -webkit-animation-duration: 0.4s; 
    animation-name: animatetop; 
    animation-duration: 0.4s 
} 


/* Add Animation */ 

@-webkit-keyframes animatetop { 
    from { 
     top: -300px; 
     opacity: 0 
    } 
    to { 
     top: 0; 
     opacity: 1 
    } 
} 

@keyframes animatetop { 
    from { 
     top: -300px; 
     opacity: 0 
    } 
    to { 
     top: 0; 
     opacity: 1 
    } 
} 


    /* The Close Button */ 

    .close { 
     color: white; 
     float: right; 
     font-size: 28px; 
     font-weight: bold; 
    } 

    .close:hover, 
    .close:focus { 
     color: #000; 
     text-decoration: none; 
     cursor: pointer; 
    } 

    .modal-header { 
     padding: 2px 16px; 
     background-color: #5cb85c; 
     color: white; 
    } 

    .modal-body { 
     padding: 2px 16px; 
    } 

    .modal-footer { 
     padding: 2px 16px; 
     background-color: #5cb85c; 
     color: white; 
    }

JS：

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

來源

2017-01-26 Swift