I've made a small hack for changing the background colour of a map, thusly:dojo.byId("map_root").style.cssText += "background-color:#99B3CC; ";I've tried doing the same for the overview map, but either the entire overview map changes the colour, or nothing changes. I've tried this on the dijits: esri_dijit_OverviewMap_0-map_graphics_layer and esri_dijit_OverviewMap_0-map_gcIs there a legitimate way to alter the overview map background colour?