added keyboard-based search result page navigation:

- page-up or tab switches to next search result page
- page-down switches to previous search result page

git-svn-id: https://svn.berlios.de/svnroot/repos/yacy/trunk@7950 6c8d7289-2bf4-0310-a012-ef5d649a1542

htroot/yacysearch.html

@@ -25,17 +25,18 @@
     evt = (evt) ? evt : ((window.event) ? event : null);
     if (evt) {
         switch (evt.keyCode) {
-            case 37:
-                window.location.href = document.getElementById("prevpage").href;
-                break;   
-            case 39:
+            case 9:
+            case 33:
                 window.location.href = document.getElementById("nextpage").href;
                 break;    
+            case 34:
+                window.location.href = document.getElementById("prevpage").href;
+                break;   
             case 40:
          }
     }
   }
-  //document.onkeydown = handleArrowKeys;
+  document.onkeydown = handleArrowKeys;
   //]]>
   </script>
 </head>