自定义Google标记在Google Map API V3上不可见

Question

我必须根据返回给我的SQL数据添加多个标记放置在Google Maps API上。代码工作正常我调试它并且它正在添加标记到地图但它不可见。它没有在Firebug中显示任何错误，也没有在后端控制台（asp.net）中显示任何错误。请帮助我，让我感到沮丧，就像疯了一样。

function initialize() {
  var mapOptions = {
    zoom: 16,
    center: new google.maps.LatLng(30.658354982307571, -96.396270512761134),
    disableDefaultUI: false,
    mapTypeId: google.maps.MapTypeId.ROADMAP
  };
  map = new google.maps.Map(document.getElementById('map_canvas'),
    mapOptions);

  init_publicmap();



  var iconBase = '/WebContent/Images/IconsBase/';
  var iconHoneyBees = {
    url: iconBase + "honeybeesicon.JPG", // url
    scaledSize: new google.maps.Size(35, 40), // scaled size
    origin: new google.maps.Point(0, 0), // origin
    anchor: new google.maps.Point(0, 0) // anchor
  };
  var iconFruitNuts = {
    url: iconBase + "fruits&nuts.JPEG", // url
    scaledSize: new google.maps.Size(35, 40), // scaled size
    origin: new google.maps.Point(0, 0), // origin
    anchor: new google.maps.Point(0, 0) // anchor
  };
  var iconForageGrass = {
    url: iconBase + "Forage_Grass.JPG", // url
    scaledSize: new google.maps.Size(35, 40), // scaled size
    origin: new google.maps.Point(0, 0), // origin
    anchor: new google.maps.Point(0, 0) // anchor
  };
  var iconFieldCrops = {
    url: iconBase + "FieldCrops.png", // url
    scaledSize: new google.maps.Size(35, 40), // scaled size
    origin: new google.maps.Point(0, 0), // origin
    anchor: new google.maps.Point(0, 0) // anchor
  };
  var iconNurseryGreen = {
    url: iconBase + "Nursery_Greenhouse.JPG", // url
    scaledSize: new google.maps.Size(35, 40), // scaled size
    origin: new google.maps.Point(0, 0), // origin
    anchor: new google.maps.Point(0, 0) // anchor
  };
  var iconVegetable = {
    url: iconBase + "vegetable.png", // url
    scaledSize: new google.maps.Size(35, 40), // scaled size
    origin: new google.maps.Point(0, 0), // origin
    anchor: new google.maps.Point(0, 0) // anchor
  };
  var icons = {
    "Vegetables": {
      icon: iconVegetable
    },
    "Greenhouse and Nursery": {
      icon: iconNurseryGreen
    },
    "Field Crops": {
      icon: iconFieldCrops
    },
    "Fruits and Nuts": {
      icon: iconForageGrass
    },
    "Forage, Grassland": {
      icon: iconFruitNuts
    },
    "Honeybees": {
      icon: iconHoneyBees
    }
  };

  function addMarker(feature) {

    var marker = new google.maps.Marker({
      position: feature.pos,
      icon: icons[feature.type].icon,
      map: map
    });

    return marker;
  }

  //createPolygons(map);
  function init_publicmap() {
    PageMethods.QueryProducers("All", "All", QueryProducers_Success, Fail);
  }

  function customfeature(lat, long, type) {
    this.type = type;
    this.pos = new google.maps.LatLng(lat, long);
  }

  function QueryProducers_Success(val) {
    var featuresloc = JSON.parse(val[1]);
    var infowindow = new google.maps.InfoWindow();
    for (var i = 0; i < featuresloc.length; i++) {
      var customfeatureloc = new customfeature();
      customfeatureloc.type = featuresloc[i].croptype;
      customfeatureloc.pos = new google.maps.LatLng(featuresloc[i].lat, featuresloc[i].long);
      var marker = addMarker(customfeatureloc, map);
      google.maps.event.addListener(marker, 'click', (function(marker, i) {
        return function() {
          infowindow.setContent(featuresloc[i].cropname);
          infowindow.open(map, marker);
        }
      })(marker, i));
    }

  }

  function Fail(val) {

  }
}

请让我知道我哪里错了.. !!