How to disable Google Map MouseOver - asp.net

Question

I am making an aspx page to track vehicles. The only thing I am sticking with is that I don't know how to remove tooltip text from google markers.
The data is displaying correctly.
In the image above, (1) is being shown when I am taking my cursor on marker image and (2) is coming when I am clicking on the marker.
I want to hide (1). How to do that?
I am using the following code:
function initMap() {
var image = '../images/FireTruck.png';
var markers = JSON.parse('<%=ConvertDataTabletoString() %>');
var mapOptions = {
center: new google.maps.LatLng(markers[0].lat, markers[0].lng),
zoom: 8,
mapTypeId: google.maps.MapTypeId.ROADMAP
};
var infoWindow = new google.maps.InfoWindow();
var map = new google.maps.Map(document.getElementById("map"), mapOptions);
for (i = 0; i < markers.length; i++) {
var data = markers[i]
var myLatlng = new google.maps.LatLng(data.lat, data.lng);
var marker = new google.maps.Marker({
position: myLatlng,
map: map,
title: data.title,
icon: image
});
(function (marker, data) {
google.maps.event.addListener(marker, "click", function (e) {
infoWindow.setContent(data.title);
infoWindow.open(map, marker);
});
})(marker, data);
}
}

Answer 1

Don't set the title property of the marker (that is what sets the tooltip).
var marker = new google.maps.Marker({
position: myLatlng,
map: map,
title: data.title, // <<<<<<<<<<<<<<<<<< REMOVE THIS
icon: image
});