open each image on its own modal page

1// Get the modal
2    var modal = document.getElementById("myModal");
3
4    // Get the image and insert it inside the modal - use its "alt" text as a caption
5    // var img = $(".myImg");
6    var modalImg = document.getElementById("img01");
7    var captionText = document.getElementById("caption");
8    function image(event)  {    
9        modal.style.display = "block";
10        modalImg.src = event.target.src;
11        captionText.innerHTML = event.target.alt;
12    }
13
14    // Get the <span> element that closes the modal
15    var span = document.getElementsByClassName("close")[0];
16
17    // When the user clicks on <span> (x), close the modal
18    span.onclick = function () {
19        modal.style.display = "none";
20    }
21