How can I get the map to repeat to fill the screen?

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I'm programming my first ArcGIS application. I've created a simple map. When I zoom out to a world view, the map doesn't fill the width of the screen. Ideally I'd like it to repeat until the available space is filled. How can I do this?

Here's the code I have so far:

var map = new esri.Map("map", {basemap: "topo",center: [0, 0],zoom: 2});And here's the result:

How can I get the map to repeat to fill the white space on either side?

(Crossposted: http://forums.arcgis.com/threads/79757-How-can-I-get-the-map-to-repeat-to-fill-the-screen)

Update:

I've set the spatial reference to (I think) Web Mercator, and wrapAround180 to true, but this has no effect. New constructor:

var map = new esri.Map("map", { basemap: "topo", center: [0, 0], zoom: 2, sliderPosition: "bottom-left", spatialRefence: new esri.SpatialReference({ "wkid": 3857 }), wrapAround180: true });What am I doing wrong?



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