From 7cdaaa1c20fbf4d5d50c823d444d7a88459ab9e9 Mon Sep 17 00:00:00 2001
From: "sgehani%netscape.com" <sgehani%netscape.com>
Date: Wed, 17 May 2006 02:32:34 +0000
Subject: [PATCH] Fix language navigation up/down button edge cases. b=120382;
 r=law; sr=hewitt

---
 suite/common/pref/pref-languages.js | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)

diff --git a/suite/common/pref/pref-languages.js b/suite/common/pref/pref-languages.js
index c8aecf35720..9bc792945d3 100644
--- a/suite/common/pref/pref-languages.js
+++ b/suite/common/pref/pref-languages.js
@@ -522,6 +522,20 @@ function MoveUp() {
       active_languages.ensureElementIsVisible(selected);
     }
   }
+  
+  if (active_languages.selectedIndex == 0)
+  {
+    // selected item is first
+    var moveUp = document.getElementById("up");
+    moveUp.disabled = true;
+  }
+
+  if (active_languages_treeroot.childNodes.length > 1)
+  {
+    // more than one item so we can move selected item back down
+    var moveDown = document.getElementById("down");
+    moveDown.disabled = false;
+  }
 
   UpdateSavePrefString();
 
@@ -543,6 +557,21 @@ function MoveDown() {
     }
   }
 
+  if (active_languages.selectedIndex == 
+      (active_languages_treeroot.childNodes.length - 1))
+  {
+    // selected item is last
+    var moveDown = document.getElementById("down");
+    moveDown.disabled = true;
+  }
+
+  if (active_languages_treeroot.childNodes.length > 1)
+  {
+    // more than one item so we can move selected item back up 
+    var moveUp = document.getElementById("up");
+    moveUp.disabled = false;
+  }
+
   UpdateSavePrefString();
 
 } //MoveDown