Edit in JSFiddle

function clickImage(image) {
	image.classList.add('zoomify');
  setTimeout(function() {
  	image.classList.remove('zoomify');
  }, 1000);
};

window.clickImageA = clickImage;
window.clickImageB = clickImage;
window.clickImageC = clickImage;
<img class="image" src="http://placehold.it/30x30" onclick="clickImageA(this)">
<img class="image" src="http://placehold.it/30x30" onclick="clickImageB(this)">
<img class="image" src="http://placehold.it/30x30" onclick="clickImageC(this)">
.image {
  width: 30px;
  height: 30px;
  border: 5px solid green;
  transform: scale(1);
  transition: all .5s;
}

.zoomify {
    transform: scale(2) !important;
}