diff --git a/demo-basic.html b/demo-basic.html
index 456f976..70601b2 100644
--- a/demo-basic.html
+++ b/demo-basic.html
@@ -59,7 +59,7 @@ <h2>Long sidebar</h2>
 		<div class="footer">
 			<p><small>made by Rick Harris <a href="http://orangecoat.com/people/rick">orangecoat.com/people/rick</a>
 		</div>
-		<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.5.2/jquery.min.js"></script>
+		<script src="//ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
 		<script>
 			$(document).ready(function() {
         var el = $('#sidebar-1'),
diff --git a/demo.html b/demo.html
index e26f6c7..31114f2 100644
--- a/demo.html
+++ b/demo.html
@@ -51,7 +51,7 @@ <h2>Long sidebar</h2>
 		<div class="footer">
 			<p><small>made by Rick Harris <a href="http://orangecoat.com/people/rick">orangecoat.com/people/rick</a>
 		</div>
-		<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js"></script>
+		<script src="//ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
 		<script src="jquery.stickyscroll.js"></script>
 		<script>
 			$(document).ready(function() {
diff --git a/fluid-demo.html b/fluid-demo.html
index 4a9d25f..6070121 100644
--- a/fluid-demo.html
+++ b/fluid-demo.html
@@ -47,7 +47,7 @@ <h2>Long sidebar</h2>
 		<div class="footer">
 			<p><small>made by Rick Harris <a href="http://orangecoat.com/people/rick">orangecoat.com/people/rick</a></small></p>
 		</div>
-		<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js"></script>
+		<script src="//ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
 		<script src="jquery.stickyscroll.js"></script>
 		<script>
 			$(document).ready(function() {
diff --git a/jquery.stickyscroll.js b/jquery.stickyscroll.js
index 0336994..f684c2c 100644
--- a/jquery.stickyscroll.js
+++ b/jquery.stickyscroll.js
@@ -37,7 +37,7 @@
         
         function bottomBoundary() {
           return $(document).height() - settings.container.offset().top
-            - settings.container.attr('offsetHeight');
+            - settings.container.height();
         }
 
         function topBoundary() {
@@ -45,7 +45,7 @@
         }
 
         function elHeight(el) {
-          return $(el).attr('offsetHeight');
+          return $(el).height();
         }
         
         // make sure user input is a jQuery object
@@ -160,4 +160,4 @@
     }
 
   };
-})(jQuery);
\ No newline at end of file
+})(jQuery);
diff --git a/manual-demo.html b/manual-demo.html
index 7c6ea2b..50d2588 100644
--- a/manual-demo.html
+++ b/manual-demo.html
@@ -44,7 +44,7 @@ <h2>Long sidebar</h2>
 		<div class="footer">
 			<p><small>made by Rick Harris <a href="http://orangecoat.com/people/rick">orangecoat.com/people/rick</a>
 		</div>
-		<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js"></script>
+		<script src="//ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
 		<script src="jquery.stickyscroll.js"></script>
 		<script>
 			$(document).ready(function() {