I took the basic ESRI example "World Topographic Map" and changed a few things. I changed the tiled layer to my own on our production AGS server (SpRef 4326). I also added a map image layer referencing a PNG image from that same server. All are publicly visible layers that we use for our other products. The map image layer is never visible in IE8, but, I can see it in Chrome 14 and Firefox 7. I have included the altered HTML below:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=7,IE=9" />
<!--The viewport meta tag is used to improve the presentation and behavior of the samples
on iOS devices-->
<meta name="viewport" content="initial-scale=1, maximum-scale=1,user-scalable=no"/>
<title>Topographic Map</title>
<link rel="stylesheet" type="text/css" href="http://serverapi.arcgisonline.com/jsapi/arcgis/2.5/js/dojo/dijit/themes/claro/claro.css">
<style>
html, body { height: 100%; width: 100%; margin: 0; padding: 0; }
.esriScalebar{
padding: 20px 20px;
}
#map{
padding:0;
}
</style>
<script type="text/javascript">var djConfig = {parseOnLoad: true};</script>
<script type="text/javascript" src="http://serverapi.arcgisonline.com/jsapi/arcgis/?v=2.5"></script>
<script type="text/javascript">
dojo.require("dijit.layout.BorderContainer");
dojo.require("dijit.layout.ContentPane");
dojo.require("esri.map");
/* require for map image layer */
dojo.require("esri.layers.MapImageLayer");
var map;
function init() {
var initExtent = new esri.geometry.Extent({"xmin":-97,"ymin":34,"xmax":-88,"ymax":41,"spatialReference":{"wkid":4326}});
map = new esri.Map("map",{extent:initExtent});
//Add the topographic layer to the map. View the ArcGIS Online site for services http://arcgisonline/home/search.html?t=content&f=typekeywords:service
var basemap = new esri.layers.ArcGISTiledMapServiceLayer("http://maps.modot.mo.gov/ArcGIS/rest/services/baseMap/baseMapCombined/MapServer");
map.addLayer(basemap);
/* mi layer code start */
var milRadar = new esri.layers.MapImageLayer({
id: "NwsRadar", opacity: 0.6, visible: true
});
var radarMapImage = new esri.layers.MapImage({
extent: { xmin: -100.164199191007, ymin: 32.421437253085, xmax: -86.0629362487793, ymax: 44.3767001897639, spatialReference: { wkid: 4326} },
href: "http://maps.modot.mo.gov/timconfig/NWS_0.png"
});
milRadar.addImage(radarMapImage);
map.addLayer(milRadar);
/* mi layer code end */
dojo.connect(map, 'onLoad', function(theMap) {
//resize the map when the browser resizes
dojo.connect(dijit.byId('map'), 'resize', map,map.resize);
});
}
dojo.addOnLoad(init);
</script>
</head>
<body class="claro">
<div dojotype="dijit.layout.BorderContainer" design="headline" gutters="false" style="width: 100%; height: 100%; margin: 0;">
<div id="map" dojotype="dijit.layout.ContentPane" region="center" style="border:1px solid #000;padding:0;">
</div>
</div>
</body>
</html>