diff --git a/css/layout1.sass b/css/layout1.sass
index c88e11a..00bb2de 100644
--- a/css/layout1.sass
+++ b/css/layout1.sass
@@ -35,7 +35,7 @@ img
   height: 600px
   background:
     image: url(../images/bird-bg.jpg)
-    size: auto 600px
+    size: cover
     position: top center
     attachment: fixed
   overflow: hidden
diff --git a/js/functions.js b/js/functions.js
index f20002f..7cb5a55 100644
--- a/js/functions.js
+++ b/js/functions.js
@@ -1,4 +1,8 @@
-var pContainerHeight = $('.bird-box').height();
+var $birdbox = $('.bird-box');
+$(function() {
+  $birdbox.css('height', $(window).height());
+});
+var pContainerHeight = $birdbox.height();
 
 $(window).scroll(function(){