Fix button images
diff --git a/style.css b/style.css
index cd5c698..6cf2fa6 100755
--- a/style.css
+++ b/style.css
@@ -101,46 +101,30 @@
 }
 
 #buttonDownload {
-   background:transparent url("images/buttonDownload.png") no-repeat 0 0;
+   background:transparent url("images/buttonDownload_empty.png") no-repeat 0 0;
    top: 0px;
    left: 0px;
 }
 
-#buttonDownload:hover {
-   background:transparent url("images/buttonDownload_sel.png") no-repeat 0 0;
-}
-
-   
+ 
 #buttonDocumentation {
-   background:transparent url("images/buttonDocumentation.png") no-repeat 0 0;
+   background:transparent url("images/buttonDocumentation_empty.png") no-repeat 0 0;
    top: 87px;
    left: 0px;
 }
 
-#buttonDocumentation:hover {
-   background:transparent url("images/buttonDocumentation_sel.png") no-repeat 0 0;
-}
-
 #buttonSupport {
-   background:transparent url("images/buttonSupport.png") no-repeat 0 0;
+   background:transparent url("images/buttonSupport_empty.png") no-repeat 0 0;
    top: 0px;
    left: 280px;
 }
 
-#buttonSupport:hover {
-   background:transparent url("images/buttonSupport_sel.png") no-repeat 0 0;
-}
-
 #buttonInvolved {
-   background:transparent url("images/buttonInvolved.png") no-repeat 0 0;
+   background:transparent url("images/buttonInvolved_empty.png") no-repeat 0 0;
    top: 87px;
    left: 280px;
 }
 
-#buttonInvolved:hover {
-   background:transparent url("images/buttonInvolved_sel.png") no-repeat 0 0;
-}
-
 #bigbuttons a * {
 	visibility: hidden;
 }