diff --git a/view/theme/diabook/icons/scroll_bottom.png b/view/theme/diabook/icons/scroll_bottom.png
new file mode 100644
index 0000000000..eba301b345
Binary files /dev/null and b/view/theme/diabook/icons/scroll_bottom.png differ
diff --git a/view/theme/diabook/nav.tpl b/view/theme/diabook/nav.tpl
index e0ffa4f7b0..ce27400f64 100644
--- a/view/theme/diabook/nav.tpl
+++ b/view/theme/diabook/nav.tpl
@@ -136,7 +136,7 @@
 </nav>
 
 
-<div id="scrollup" style="position: fixed; bottom: 5px; right: 10px;"><a href="#top"><img src="view/theme/diabook/icons/scroll_top.png" alt="back to top" title="Back to top"></a></div>
+<div id="scrollup" style="position: fixed; bottom: 5px; right: 10px;"><a id="down" onclick="scrolldown()" ><img id="scroll_top_bottom" src="view/theme/diabook/icons/scroll_bottom.png" style="display:cursor !important;" alt="back to top" title="Back to top"></a></div>
 <div style="position: fixed; bottom: 3px; left: 25px;">$langselector</div>
 <div style="position: fixed; bottom: 23px; left: 5px;"><a href="http://pad.toktan.org/p/diabook" target="blank" ><img src="view/theme/diabook/icons/bluebug.png" title="report bugs for the theme diabook"/></a></div>
 
diff --git a/view/theme/diabook/theme.php b/view/theme/diabook/theme.php
index 269015d0a3..073e270ef9 100755
--- a/view/theme/diabook/theme.php
+++ b/view/theme/diabook/theme.php
@@ -356,25 +356,48 @@ $(document).ready(function() {
             $(this).attr("src",newString+"?"+wmode+"&"+oldString);
         }
         else $(this).attr("src",ifr_source+"?"+wmode);
+       
     });
-    
-    $("a[href=#top]").click(function() {
-			$("html, body").animate({scrollTop:0}, "slow");
-			return false;
-		});
       
-
 });
 
 function yt_iframe() {
 
-
 	$("iframe").load(function() { 
 	var ifr_src = $(this).contents().find("body iframe").attr("src");
 	$("iframe").contents().find("body iframe").attr("src", ifr_src+"&wmode=transparent");
     });
 
 	};
+
+function scrolldown(){
+			$("html, body").animate({scrollTop:$(document).height()}, "slow");
+			return false;
+		};
+		
+function scrolltop(){
+			$("html, body").animate({scrollTop:0}, "slow");
+			return false;
+		};
+	 	
+$(window).scroll(function () { 
+		
+				
+		var scrollInfo = $(window).scrollTop();      
+		
+		if (scrollInfo <= "900"){
+      $("a#top").attr("id","down");
+      $("a#down").attr("onclick","scrolldown()");
+	 	$("img#scroll_top_bottom").attr("src","view/theme/diabook/icons/scroll_bottom.png");
+	 	} 
+	 	    
+      if (scrollInfo > "900"){
+      $("a#down").attr("id","top");
+      $("a#top").attr("onclick","scrolltop()");
+	 	$("img#scroll_top_bottom").attr("src","view/theme/diabook/icons/scroll_top.png");
+	 	}
+		
+    });
   
  </script>';