gistfile1.js

for(var i=0;i<data.length;i++)
{
    var lat = data[i].latitude;
    var lng = data[i].longitude;
    var latLng = new google.maps.LatLng(lat, lng);
    var marker = new google.maps.Marker({map: map, position: glatLng});
    markersArray.push(marker);
    
    // Set an attribute on the marker, it can be named whatever...
    marker.html = '<div>My content goes here for ['+lat+', '+lng+']</div>';
    
    google.maps.event.addListener(marker, 'click', function(){
        // Set the content of the InfoBubble or InfoWindow
        // They both have a function called setContent
        infoBubble.setContent(this.html);
        infoBubble.open(map, this);
    });
}