Index: editor/_source/internals/fckdomtools.js
===================================================================
--- editor/_source/internals/fckdomtools.js	(revision 2662)
+++ editor/_source/internals/fckdomtools.js	(working copy)
@@ -376,17 +376,23 @@
 
 	GetIndexOf : function( node )
 	{
-		var currentNode = node.parentNode ? node.parentNode.firstChild : null ;
-		var currentIndex = -1 ;
+		if (!node.parentNode)
+			return -1;
 
-		while ( currentNode )
-		{
-			currentIndex++ ;
-
-			if ( currentNode == node )
-				return currentIndex ;
-
-			currentNode = currentNode.nextSibling ;
+		if (node.parentNode.firstChild) {
+			var currentIndex = 0;
+			var currentNode = node.parentNode.firstChild;
+			while (currentNode) {
+				if (currentNode == node)
+					return currentIndex;
+				currentNode = currentNode.nextSibling;
+				currentIndex++;
+			}
+		} else {
+			if (node.parentNode.childNodes)
+				for (var i = 0; i < node.parentNode.childNodes.length; i++)
+					if (node.parentNode.childNodes[i] == node)
+						return i;
 		}
 
 		return -1 ;