added beastify

beastify/content_scripts/beastify.js

@@ -0,0 +1,23 @@
+
+chrome.runtime.onMessage.addListener(beastify);
+  
+function beastify(request, sender, sendResponse) {
+  var beastURL = beastNameToURL(request.beast);
+  var images = document.querySelectorAll("img");
+  for (var i = 0; i < images.length; ++i) {
+    images[i].setAttribute("src", beastURL);
+  }
+  
+  document.body.style.backgroundImage = "url(" + beastURL + ")";
+}
+
+function beastNameToURL(beastName) {
+  switch (beastName) {
+    case "Frog":
+      return chrome.extension.getURL("beasts/frog.jpg");
+    case "Snake":
+      return chrome.extension.getURL("beasts/snake.jpg");
+    case "Turtle":
+      return chrome.extension.getURL("beasts/turtle.jpg");
+  }
+}