diff --git a/public/scripts/script_iphone.js b/public/scripts/script_iphone.js
index 8d87c3f..6f1e333 100644
--- a/public/scripts/script_iphone.js
+++ b/public/scripts/script_iphone.js
@@ -239,7 +239,7 @@ function update_read_count(connection_id, msg_id) {
 
 function scroll_if_necessary(connection_id, target) {
   if (current.connection_id == connection_id && current.target == target) {
-    div_parent_activity.scrollTop = div_parent_activity.scrollHeight
+    document.body.scrollTop = document.body.scrollHeight;
     div_activity_info.textContent = "Last activity: " + timestamp_long(connections[connection_id].targets[target].last_activity)
   }
 }
diff --git a/public/styles/style_iphone.css b/public/styles/style_iphone.css
index b86b884..b200a2f 100644
--- a/public/styles/style_iphone.css
+++ b/public/styles/style_iphone.css
@@ -110,7 +110,7 @@ body {
 
 #activity {
   width: 320px;
-  height: 300px;
+/*  height: 300px;*/
   overflow: auto;
 }