filled in MsgEmptyTrash() function

mailnews/base/resources/content/widgetglue.js

@@ -265,22 +265,45 @@ function MsgLoadFirstDraft()
 }
 function MsgUpdateMsgCount() {}
 function MsgRenameFolder() {}
-function MsgEmptyTrash() {}
+function MsgEmptyTrash() 
+{
+    var tree = GetFolderTree();
+    if (tree)
+    {
+        var folderList = tree.getElementsByAttribute("selected", "true");
+        if (folderList)
+        {
+            var folder;
+            folder = folderList[0];
+            if (folder)
+                messenger.EmptyTrash(tree.database, folder);
+        }
+    }
+}
 function MsgRenameFolder() {}
 function MsgCompactFolder() 
 {
 	//get the selected elements
 	var tree = GetFolderTree();
-	var folderList = tree.getElementsByAttribute("selected", "true");
-	var i;
-	var folder;
-	for(i = 0; i < folderList.length; i++)
-	{
-		folder = folderList[i];
-	    folderuri = folder.getAttribute('id');
-		dump(folderuri);
-		dump("folder = " + folder.nodeName + "\n"); 
-		messenger.CompactFolder(tree.database, folder);
+    if (tree)
+    {
+        var folderList = tree.getElementsByAttribute("selected", "true");
+        if (folderList)
+        {
+            var i;
+            var folder;
+            for(i = 0; i < folderList.length; i++)
+            {
+                folder = folderList[i];
+                if (folder)
+                {
+                    folderuri = folder.getAttribute('id');
+                    dump(folderuri);
+                    dump("folder = " + folder.nodeName + "\n"); 
+                    messenger.CompactFolder(tree.database, folder);
+                }
+            }
+        }
 	}
 }