function item ( id ) {
   popup = window.open ( 'item.php?id=' + id, 'popup', 'width=300,height=190,left=140,top=140,scrolling=yes' );
   popup.focus ();
}

function onload_popup ( pop, w, h ) {
   if ( !w ) { w = 300; }
   if ( !h ) { h = 190; }
   popup = window.open ( 
      'popup.php?popup=' + pop, 
      'popup', 
      'width=' + w + ',height=' + h + ',left=140,top=140,scrolling=no' 
   );
   popup.focus ();
   popup.opener = self;
}