diff --git a/theme/orangewhite/styles_layout.css b/theme/orangewhite/styles_layout.css
index 48ede844c3a..fbc2d2db7e6 100644
--- a/theme/orangewhite/styles_layout.css
+++ b/theme/orangewhite/styles_layout.css
@@ -684,6 +684,18 @@ TD.cal_event_description {
     padding-top:0.35em;
 }
 
+.sideblock .sideblockheading .hide-show img {
+    background: url('../../pix/t/switch_minus.gif') no-repeat bottom;
+}
+
+.sideblock.hidden .sideblockheading .hide-show img {
+    background: url('../../pix/t/switch_plus.gif') no-repeat bottom;
+}
+
+.sideblock.hidden .sideblockmain {
+    display: none;
+}
+
 .sideblockmain HR {
 	height:1px;
 	border:none;
diff --git a/theme/standard/styles_layout.css b/theme/standard/styles_layout.css
index e15d3d78f88..0c2928484cb 100644
--- a/theme/standard/styles_layout.css
+++ b/theme/standard/styles_layout.css
@@ -461,11 +461,11 @@ td.cal_event_description {
 }
 
 .sideblock .sideblockheading .hide-show img {
-    background: url('../../pix/t/switch.gif') no-repeat bottom;
+    background: url('../../pix/t/switch_minus.gif') no-repeat bottom;
 }
 
 .sideblock.hidden .sideblockheading .hide-show img {
-    background: url('../../pix/t/down.gif') no-repeat bottom;
+    background: url('../../pix/t/switch_plus.gif') no-repeat bottom;
 }
 
 .sideblock.hidden .sideblockmain {