i’ve added Alt tage to my images. but not all work. i checked my html and it seems fine.
http://www.charismacommunications.ca/422/gallery.html
<!DOCTYPE html>
<!-- Website template by freewebsitetemplates.com -->
<html>
<head>
<meta charset="UTF-8">
<title><title>Gallery - Charisma Communications</title></title>
<link rel="stylesheet" href="css/style.css" type="text/css">
<!--[if IE]>
<link rel="stylesheet" href="css/ie.css" type="text/css" charset="utf-8">
<![endif]-->
<link href="https://cdnjs.cloudflare.com/ajax/libs/lightbox2/2.11.3/css/lightbox.min.css" rel="stylesheet">
<script src="https://cdnjs.cloudflare.com/ajax/libs/lightbox2/2.11.3/js/lightbox-plus-jquery.min.js"></script>
<title>Charisma Communications - Gallery</title>
</head>
<body>
<div id="page">
<div id="header">
<a href="index.html" id="logo"><img src="images/logo.png" alt="LOGO"></a>
<ul id="navigation">
<li class="selected">
<a href="index.html" title="Home"></a>
</li>
<li>
<a href="about.html">About</a>
</li>
<li>
<a href="speaker.html">Speaker</a>
</li>
<li>
<a href="gallery.html">Gallery</a>
</li>
<!---
<li>
<a href="services.html">Services</a>
</li>
<li>
<a href="news.html">News</a>
</li>
<li>
<a href="blog.html">Blog</a>
</li>
--->
<li class="last-child">
<a href="contact.html">Contact us</a>
</li>
</ul>
</div>
<div id="contents">
<div class="gallery">
<div class="thumbnail">
<a href="images/AmericanGoldfinch.jpg" data-lightbox="gallery" data-title="American Goldfinch">
<img src="images/AmericanGoldfinch.jpg" alt="American Goldfinch">
</a>
</div>
<div class="thumbnail">
<a href="images/cappedchickadee.jpg" data-lightbox="gallery" data-title="Black-capped chickadee">
<img src="images/cappedchickadee.jpg" alt="Black-capped chickadee">
</a>
</div>
<div class="thumbnail">
<a href="images/cappedchickadee2.jpg" data-lightbox="gallery" data-title="Second Picture of Black-capped chickadee">
<img src="images/cappedchickadee2.jpg" alt="Second Picture of Black-capped chickadee">
</a>
</div>
<div class="thumbnail">
<a href="images/Harris.jpg" data-lightbox="gallery" data-title="Harris Sparrow">
<img src="images/Harris.jpg" alt="Harris Sparrow">
</a>
</div>
<div class="thumbnail">
<a href="images/Finch.jpg" data-lightbox="gallery" data-title="House Finch">
<img src="images/Finch.jpg" alt="House Finch">
</a>
</div>
<div class="thumbnail">
<a href="images/Finch2.jpg" data-lightbox="gallery" data-title="Second Picture of House Finch">
<img src="images/Finch2.jpg" alt="Second Picture of House Finch">
</a>
</div>
<br>
<div class="thumbnail">
<a href="images/Morning Dove.jpg" data-lightbox="gallery" data-title="Morning Dove">
<img src="images/Morning Dove.jpg" alt="Morning Dove">
</a>
</div>
<div class="thumbnail">
<a href="images/White Throated Sparrow.jpg" data-lightbox="gallery" data-title="White Throated Sparrow">
<img src="images/White Throated Sparrow.jpg" alt="White Throated Sparrow">
</a>
</div>
<div class="thumbnail">
<a href="images/Eastern Phoebe.jpg" data-lightbox="gallery" data-title="Eastern Phoebe">
<img src="images/Eastern Phoebe.jpg" alt="Eastern Phoebe">
</a>
</div>
<div class="thumbnail">
<a href="images/Mallard Duck.jpg" data-lightbox="gallery" data-title="Female Mallard Duck">
<img src="images/Mallard Duck.jpg" alt="Female Mallard Duck">
</a>
</div>
<div class="thumbnail">
<a href="images/White Tail Deer.jpg" data-lightbox="gallery" data-title="Female White-tailed deer">
<img src="images/White Tail Deer.jpg" alt="Female White-tailed deer">
</a>
</div>
<!-- Add more thumbnails as needed -->
</div>
<script src="https://cdnjs.cloudflare.com/ajax/libs/lightbox2/2.11.3/js/lightbox-plus-jquery.min.js"></script>
</body>
</html>
</div>
<div id="footer">
<div class="connect">
<!---<a href="http://freewebsitetemplates.com/go/facebook/" target="_blank" class="facebook"></a> <a href="http://freewebsitetemplates.com/go/twitter/" target="_blank" class="twitter"></a> <a href="http://freewebsitetemplates.com/go/googleplus/" target="_blank" class="googleplus"></a>
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</div>
<p>
Copyright © 2024. Charisma Communications All Rights Reserved.
</p>
</div>
</div>
</body>
</html>