function addToFavorites() {
	if(document.all) {
		window.external.AddFavorite(location.href, document.title);
	} else {
		alert("Sorry, this feature only works in Internet Explorer browsers.");
	}
}

function showCenteredPopup(href, wnd_width, wnd_height) {
  try {
    var wnd_left = Math.round((screen.width-wnd_width)/2);
    var wnd_top = Math.round((screen.height-wnd_height)/2)-20;

    window.open(href, "", "width="+wnd_width+",height="+wnd_height+",left="+wnd_left+",top="+wnd_top+",scrollbars=yes,statusbar=no");
	
	return true;
  } catch(e) { alert(e.message); return false; }
}

function orderIOL(url) {
	return !showCenteredPopup(url, 675, 500);
}