function viewform(m, w, h, scrol) {
   var scroll = 'yes';
   var settings;
   var LeftPosition;
   var TopPosition;
   var win;

   if (!scrol) scrol = 'no';

   LeftPosition = (screen.width) ? (screen.width-w)/2 : 0;
   TopPosition = (screen.height) ? (screen.height-h)/2 : 0;
  
   settings = 'height='+h+',width='+w+',top='+TopPosition+',left='+LeftPosition+',scrollbars='+scroll;

   if (scrol == 'no') settings = settings + ',resizable=no,maximize=no';
   if (scrol == 'yes') settings = settings + ',resizable=yes,maximize=yes';

   settings = settings + ',status=no,toolbar=no,directories=no,menubar=no,location=no';
		      
   win = window.open(m, 'pre', settings);
   win.name = 'name';
   win.focus();
}