function show (url, XX, YY)
 {
   var x = window.screen.width;
   var y = window.screen.height;
   var text;
   if(XX < x && YY < y) {   
     text = 'scrollbars=0, toolbar=0, resizable=0, status=0, width=' + XX + ', height=' + YY;
    }
   if(XX > x || YY > y) {   
     text = 'scrollbars=1, toolbar=0, resizable=0, status=0, width=' + XX + ', height=' + YY;
    }       
   newwin=window.open(url, '_blank', text);
 }