function PopupWindow()
   {  var iTop = 10;
     
	  var iWidth = 550;
	  var iHeight = 550;
	   var iLeft = screen.width - iWidth - 75;
		
      var newWindow = window.open('http://www.tboek.nl/tboek/index.php?name=lezgelm', 'newWindow','width=' + iWidth + ',height=' + iHeight + ',menubar=no,scrollbars=yes,toolbar=no,location=no,directories=no,resizable=no,top=' + iTop + ',left=' + iLeft); 
		newWindow.focus();
   }