diff --git a/12/style.css b/12/style.css
index 962a493..5852903 100644
--- a/12/style.css
+++ b/12/style.css
@@ -465,6 +465,11 @@ a:hover{
   border: 3px white solid;
   top: 530px;
   left: 0px;
+  z-index:100;
+}
+
+.etherpad_iframe:hover{
+  z-index:1000;
 }
 
 iframe.hidden {
@@ -535,6 +540,7 @@ ul#table_content_05 li{
 	position: absolute;
   	top: 40px;
   	left: 900px;
+    z-index:100;
 }
 
 #week_05.hidden{
@@ -547,6 +553,17 @@ ul#table_content_05 li{
   display:none;
 }
 
+#week_05:hover{
+  z-index:1000;
+}
+#shell_03:hover{
+  z-index:1000;
+}
+#resources_05:hover{
+  z-index:1000;
+}
+
+
 #TOC_icon {
 	color: white;
 	border: 3px white solid;