diff --git a/oasis/pra.css b/oasis/pra.css
index 7cd2fbb..7162c12 100644
--- a/oasis/pra.css
+++ b/oasis/pra.css
@@ -46,17 +46,21 @@
 	     margin: 20px 50px; padding: 10px 20px;
 }
 
-p.mimg {
-  float: left;
-  margin-right: 2px;
-  margin-bottom: 1px;
-}
+div.back{
+	 position: fixed; right: 0.2ex; bottom: 0; width: 9em;
+  	
+	}
 
 a.tlink{
     text-align: right;
     color: black;
 }
 
+p.mimg {
+  float: left;
+  margin-right: 2px;
+  margin-bottom: 1px;
+}
 
 
 .footer {
@@ -66,4 +70,4 @@
        margin-left: 2px;
        margin-top: 10px;
        background: #a9b881;
-}
\ No newline at end of file
+}