rodion7195,
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<head>
<title>Untitled</title>
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<style>
.content{
position: relative;
}
.content img{
position: absolute;
opacity: 0;
transition: all 1.2s ease-in-out;
display: block;
}
.content img.active{
opacity: 1;
}
.content .pic.active{
background-color: #8B4513;
color: #FFFFFF;
}
</style>
<script src="https://cdn.polyfill.io/v1/polyfill.js?Element.prototype.closest"></script>
<script>
window.addEventListener("DOMContentLoaded", function() {
var content = document.querySelector(".content");
content.addEventListener("click", function(event) {
var target = event.target;
if (target = target.closest(".pic")) {
event.preventDefault();
var a = content.querySelectorAll(".pic");
var img = content.querySelectorAll("img");
var selected = [].indexOf.call(a, target);
[].forEach.call(a, function(el, i) {
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<a href="" class="pic active">1картинка</a>
<a href="" class="pic">2картинка</a>
<a href="" class="pic">3картинка</a>
<img src="https://s1.1zoom.ru/prev2/514/Cats_Glance_Whiskers_513437_300x200.jpg" alt="" class="active">
<img src="https://trackimo.com/wp-content/uploads/2016/05/TRACKIMO-FI-5-Year-Study-Reveals-Shocking-Statistics-on-Lost-Pets-300x200.jpg" alt="">
<img src="https://www.walldevil.com/wallpapers/w02/thumb/812503-cats-kittens-siamese.jpg" alt="">
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