</head> <body> <h1>Advanced Sidebar</h1> <?php require '_system/nav.php'; ?> <?php $map->printMap(); ?> <div id="map_sidebar"> <ul class="sidebar"> <?php foreach ($map->getMarkers() as $n => $marker) { ?> <li id="marker<?php echo $n; ?> " style="background-image: url(<?php echo $marker->getIcon(); ?> )" onclick="<?php echo $marker->getOpener(); ?> "> <h3><?php echo $marker->title; ?> </h3>