How to create pop up windows on google map clusterer circles - google-maps

Question

I am using the following google map plugin
google map clusterer
And it works perfectly(insead of random variable that you see in that link I just read locations from database.)
Now I have been asked the followoing: when a user hover on the clustered area(Not a markers) , by clustered area I mean red or yellow or blue circle , I want a pop up window appears for showing some information . I searched the web a lot but I could not find anything, Is it possible to do this?(I appreciate any help)
Update:
Here is the code that I am using :
$('#map_canvas').gmap({ 'zoom': 3, 'disableDefaultUI': true }).one('init', function (evt, map) {
var bounds = map.getBounds();
var temp = mark1;
var southWest = bounds.getSouthWest();
var northEast = bounds.getNorthEast();
var lngSpan = northEast.lng() - southWest.lng();
var latSpan = northEast.lat() - southWest.lat();
for (var i = 0; i < 300; i++) {
var contentString = 'test';
var $marker = $(this).gmap('addMarker',
{
'id': i, 'position': new google.maps.LatLng(
southWest.lat() + latSpan * Math.random(),
southWest.lng() + lngSpan * Math.random()),
'content': 'm_' + i
}).click(function (i) {
$('#map_canvas').gmap('openInfoWindow', {
content: this.content
}, this);
});
markers.push($marker); // add to the marker array
}
$(this).gmap('set', 'MarkerClusterer', new MarkerClusterer(map, $(this).gmap('get', 'markers')));
});

Answer 1

With the latest markerclusterer.js this should work:
google.maps.event.addDomListener(markerClusterer, 'mouseover', function() {
console.log('mouse over marker clusterer');
});