lazy loading certifiaction images

js/cert.js

@@ -0,0 +1,14 @@
+//Certification show
+var modal = document.getElementById("myModal");
+var modalImg = document.getElementById("modalImage1");
+
+function modalImg() {
+    modal.style.display = "block";
+    modalImg.src = this.src;
+}
+
+// When the user clicks on <span> (x), close the modal
+var span = document.getElementsByClassName("close")[0];
+span.onclick = function () {
+    modal.style.display = "none";
+};