Google Maps v3 Infobox Plugin

HTML

<!DOCTYPE html>
<html>
<head>
<script type="text/javascript" src="http://maps.google.com/maps/api/js?sensor=false"></script>
<script type="text/javascript" src="http://google-maps-utility-library-v3.googlecode.com/svn/trunk/infobox/src/infobox.js"></script>
<script type="text/javascript">
function initialize() {
    var loc, map, marker, infobox;
    
    loc = new google.maps.LatLng(-33.890542, 151.274856);
    
    map = new google.maps.Map(document.getElementById("map"), {
         zoom: 12,
         center: loc,
         mapTypeId: google.maps.MapTypeId.ROADMAP
    });
    
    marker = new google.maps.Marker({
        map: map,
        position: loc,
        visible: true
    });

    infobox = new InfoBox({
         content: document.getElementById("infobox"),
         disableAutoPan: false,
         maxWidth: 150,
         alignBottom: true,
         pixelOffset: new google.maps.Size(-140, -50),
         zIndex: null,
         boxStyle: {
            backgroundImage: "url('https://directory.fsf.org/w/extensions/SemanticDrilldown/skins/down-arrow.png')",
            backgroundRepeat: "no-repeat",
            /*backgroundPosition: "center bottom",*/
            opacity: 0.75,
            width: "280px"
        },
        closeBoxMargin: "12px 4px 2px 2px",
        closeBoxURL: "http://www.google.com/intl/en_us/mapfiles/close.gif",
        infoBoxClearance: new google.maps.Size(1, 1)
    });
    
    google.maps.event.addListener(marker, 'click', function() {
        infobox.open(map, this);
        map.panTo(loc);
    });
}
google.maps.event.addDomListener(window, 'load', initialize);
</script>
<title>Creating and Using an InfoBox</title>
</head>

<body>
<div id="map" style="width: 100%; height: 300px"></div>
<br>

InfoBox as an easily customizable replacement for an InfoWindow. Click on the marker to see the infobox generated with custom html &amp; css.
<div class="infobox-wrapper">
    <div id="infobox">
        The contents of your info box. It's very...

CSS

.infobox-wrapper {
    display:none;
}
#infobox {
    border:1px solid black;
    margin-top: 8px;
    background:#fff;
    color:#000;
    font-family:Arial, Helvetica, sans-serif;
    font-size:12px;
    padding: .5em 1em;
    -webkit-border-radius: 5px;
    -moz-border-radius: 5px;
    border-radius: 5px;
    /*text-shadow:0 -1px #000000;*/
    -webkit-box-shadow: 0 0  8px #000;
    box-shadow: 0 0 8px #000;
}

#infobox:after{
    content: "";
    position: absolute;
    bottom: -15px;
    left: 125px;
    border-width: 15px 15px 0;
    border-style: solid;
    border-color: #333 transparent;
    display: block;
    width: 0;
}