关于jquery：如何在每个谷歌地图标记上显示工具提示

How to show tooltip on each google map marker

本问题已经有最佳答案，请猛点这里访问。

我在每个谷歌地图标记上显示工具提示时遇到一些问题。
但它只显示一个标记上的工具提示。
这是我的小提琴
http://jsfiddle.net/amit4mins/6UnTr/35/

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$(document).ready(function(){
var locations=[
['loc1',40.23, -70.34],
['loc7',40.23, -70.34],
['loc8',40.23, -70.34],
['loc2',41.24, -71.35],
['loc3',42.25, -72.36],
['loc4',43.26, -73.37],
['loc5',44.27, -74.34],
['loc6',45.28, -75.34],
['loc6',46.29, -76.34]];
function initialize() {
console.log(locations);
var mapOptions = {
center: new google.maps.LatLng(-34.397, 150.644),
zoom: 3,
mapTypeId: google.maps.MapTypeId.ROADMAP,
};
var map = new google.maps.Map(document.getElementById("map_canvas"),mapOptions);

var marker, i;

for (i = 0; i < locations.length; i++) {

var infoWindow = new google.maps.InfoWindow({
content: locations[i][0],
});
marker = new google.maps.Marker({
position: new google.maps.LatLng(locations[i][1], locations[i][2]),
map: map,
title:locations[i][0]
});
google.maps.event.addListener(marker, 'click', function() {
infoWindow.open(map, marker);
});

}
marker.setMap(map);

}
google.maps.event.addDomListener(window, 'load', initialize);

});

谁能让我知道我做错了什么。

非常感谢，
M.