moving all labs to old dir

old/lectures/lec6/part2/task4.js

@@ -0,0 +1,9 @@
+document.querySelectorAll('img').forEach(function(img) {
+    img.addEventListener('mouseover', function() {
+        this.classList.add('border');
+    });
+
+    img.addEventListener('mouseout', function() {
+        this.classList.remove('border');
+    });
+});