var upload_range = 1;





function traidntslot( num )

{

    if ( upload_range < max_tr_upload )

    {

        if ( num == upload_range )

        {

            var up = document.getElementById( 'tr_up' );

            var dv = document.createElement( "div" );



            dv.innerHTML = '<input  type="file" name="upfile_' + upload_range

                               + '" size="54" onchange="traidntslot(' + (upload_range + 1) + ')">';

            up.appendChild( dv );

            upload_range++;

            document.tr_upload.upload_range.value = upload_range;

        }

    }

}