Change examples from using OnEarth WMS because it no longer support 512px tiles.

git-svn-id: http://svn.openlayers.org/trunk/openlayers@5117 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

examples/image-layer.html

@@ -26,8 +26,8 @@
                                 options);
 
             var jpl_wms = new OpenLayers.Layer.WMS( "NASA Global Mosaic",
-                "http://wms.jpl.nasa.gov/wms.cgi", 
-                {layers: "modis,global_mosaic"}, options);
+                "http://t1.hypercube.telascience.org/tiles/landsat7", 
+                {layers: "landsat7"}, options);
 
             map.addLayers([graphic, jpl_wms]);
             map.addControl(new OpenLayers.Control.LayerSwitcher());