-my @files = map "overlibmws$_", ( '', qw( _iframe _draggable _crossframe ) );
-push @files, map { "${_}contentmws" } qw( iframe ajax );
+my @files = ();
+if ( ! $initialized ) {
+ push @files, map "overlibmws$_", ( '', qw( _iframe _draggable _crossframe ) );
+ push @files, map { "${_}contentmws" } qw( iframe ajax );
+ $initialized++;
+}