Index: /FCKeditor/trunk/editor/dialog/common/fck_dialog_common.js
===================================================================
--- /FCKeditor/trunk/editor/dialog/common/fck_dialog_common.js	(revision 761)
+++ /FCKeditor/trunk/editor/dialog/common/fck_dialog_common.js	(revision 762)
@@ -60,4 +60,10 @@
 }
 
+var KeyIdentifierMap = 
+{
+	Left	: 37,
+	Right	: 39
+} 
+
 // Functions used by text fields to accept numbers only.
 function IsDigit( e )
@@ -67,4 +73,7 @@
 
 	var iCode = ( e.keyCode || e.charCode ) ;
+	
+	if ( !iCode && e.keyIdentifier && ( e.keyIdentifier in KeyIdentifierMap ) ) 
+			iCode = KeyIdentifierMap[ e.keyIdentifier ] ;
 
 	return (