/*for subdirectories*/
function new_win(subdir,file)
/*for same directory*/
/*function new_win(file)*/
{
/* for subdirectories*/
url = 'viewer.php?subdir=' + subdir + '&filename=' + file;
/*for same directory*/
/*url = 'viewer.php?filename=' + file;*/

window.open(url, 'new_win','toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=yes,copyhistory=yes,resizable=yes,height=550,width=550');

}