How to make a gallery of pictures so that when you click on the lower ones, they do not open in a new tab, but become large instead of the main one?

Question

JavaScript

Here is the code:
$(document).ready(function() {
$('#small a').click(function(eventObject) {
$('#big img').hide().attr('src', $ (this) .attr('href'))
$('#big img').load(function() {
$(this).fadeIn(2000);
});
eventObject.preventDefault();
});
}) ;

Answer 1

https://regex101.com/r/sUbQnC/1

Answer 2

1. find a sequence of capital letters in the word
2. insert "1" before it and behind it
3. what is the question?