diff --git a/HTML/css/tabs.css b/HTML/css/tabs.css
index f3b86f9a2..48e58b520 100644
--- a/HTML/css/tabs.css
+++ b/HTML/css/tabs.css
@@ -1,5 +1,8 @@
 * { margin: 0; padding: 0; }
-body { font: 12px "Lucida Grande", Helvetica, Arial, serif; }
+body {
+    font: 12px "Lucida Grande", Helvetica, Arial, serif;
+    overflow: hidden;
+}
 iframe { border: 0; }
 
 .clearfix:after {