google map api地面叠加层不能显示网络图片
- C# code
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %><!DOCTYPE html><html><head><meta name="viewport" content="initial-scale=1.0, user-scalable=no" /><style type="text/css"> html { height: 100% } body { height: 100%; margin: 0px; padding: 0px } #map_canvas { height: 100% }</style><script type="text/javascript" src="https://ditu.google.com/maps/api/js?sensor=true"></script><script type="text/javascript"> function initialize() { var newark = new google.maps.LatLng(40.740, -74.18); var imageBounds = new google.maps.LatLngBounds( new google.maps.LatLng(40.716216, -74.213393), new google.maps.LatLng(40.765641, -74.139235)); var myOptions = { zoom: 13, center: newark, mapTypeId: google.maps.MapTypeId.ROADMAP } var map = new google.maps.Map(document.getElementById("map_canvas"), myOptions); var oldmap = new google.maps.GroundOverlay("http://www.lib.utexas.edu/maps/historical/newark_nj_1922.jpg",imageBounds); oldmap.setMap(map); } google.maps.event.addDomListener(window, 'load', initialize);</script></head><body> <div id="map_canvas" style="width:100%; height:100%"></div></body></html>想在地图上面加一个叠加层，图片"http://www.lib.utexas.edu/maps/historical/newark_nj_1922.jpg"可通过网络访问，但是不能加载到地图上；但是如果把图片保存到文件夹里边，通过"image3/img"可以正常加载。这是怎么回事哦？求解！
[解决办法]
IE7，IE8，firefox4.0都可以加载，没问题