function openWindow(url)
{
	var width  = 300;
	var height = 500;
	var left   = (screen.width  - width)/2;
	var top    = (screen.height - height)/2;
	var params = 'width='+width+', height='+height;
	
	params += ', top='+top+', left='+left;
	params += ', directories=no';
	params += ', location=no';
	params += ', menubar=no';
	params += ', resizable=no';
	params += ', scrollbars=yes';
	params += ', status=no';
	params += ', toolbar=no';

	newwin=window.open(url,'newwindow', params);
	
	if (window.focus) 
	{
		newwin.focus()
	}
	
	return false;	
}