function friend_try(theURL) { //v2.0
  // bepaal nu het centrum
  var twin;
  
 
  features='scrollbars=auto,toolbars=no,status=no';
  
  w = 400;
  h = 300;

  mleft = (screen.width - w) / 2;
 	 mtop = (screen.height - h) / 2;

    features = features + ',top=' + mtop + ',left=' + mleft + ',width=' + w + ',height=' + h ;

 
 
  twin = window.open(theURL,"win_friend_try",features);
  twin.focus();
}


function friend_try_form(theURL) { //v2.0
  // bepaal nu het centrum
  var twin;
  
 
  features='scrollbars=auto,toolbars=no,status=no';
  
  w = 600;
  h = 500;

  mleft = (screen.width - w) / 2;
 	 mtop = (screen.height - h) / 2;

    features = features + ',top=' + mtop + ',left=' + mleft + ',width=' + w + ',height=' + h ;

 
 
  twin = window.open(theURL,"win_friend_try_form",features);
  twin.focus();
}