function showWindow(url, winWidth, winHeight) {
  var x = (screen.width / 2)  - (winWidth / 2);
  var y = (screen.height / 2) - (winHeight / 2);

  window.open(url,'WINDOW','resizable=0,location=0,directories=0,status=0,menubar=0,scrollbars=1,toolbar=0,width=' +winWidth+ ',height=' +winHeight+ ',left =' +x+ ',top =' + y + '');
 }

 function choose_goodie() {      
  var theURL = "goodie_choose_w.php?nId=<?=$ID?>";
  var winWidth  = 400;
  var winHeight = 250;
   

  var x = (screen.width / 2)  - (winWidth / 2);
  var y = (screen.height / 2) - (winHeight / 2);

  window.open(theURL,'GOODIE','resizable=0,location=0,directories=0,status=0,menubar=0,scrollbars=0,toolbar=0,width=' +winWidth+ ',height=' +winHeight+ ',left =' +x+ ',top =' + y + '');    
 }