/* Enlarging images */
var img = document.getElementsByClassName("showcaseimg");
function enlarge(input) {
    var interval;
    setInterval(function() {
        input.style.transform="scale(2,2)";

        window.onclick = function() {
            clearInterval(interval);
        }
    }, 3000);
}
for (i = 0; i < img.length; i++) {
    i.onclick = enlarge(i);
}