diff --git a/index.html b/index.html
index 9648ce7..ea08929 100644
--- a/index.html
+++ b/index.html
@@ -4,7 +4,8 @@
     <title>Introduction to Github</title>
   </head>
   <body>
-    <h2>Welcome to Github!</h2>
+    <h2>Welcome to Github! Dave's Fork</h2>
     <script src="js/github.js"></script>
+    This is my fork of Linda's github intro.
   </body>
 </html>
diff --git a/js/catify.js b/js/catify.js
new file mode 100644
index 0000000..28e06e7
--- /dev/null
+++ b/js/catify.js
@@ -0,0 +1,13 @@
+//Catify.js
+//Javascript library to replace all images in any given webpages with those of cats
+//Wouldn't that be cute?  Would be a good public wi-fi prank.
+
+
+//Sources for cat images to replace with go here.  Images randomly selected from this list.
+Array Images
+{
+  image1.png,
+  image2.png,
+  image3.png
+
+}
