var bgs = [
	"bolivia_altiplano.jpg",
	"bolivia_lapaz_centrum.jpg",
	"bolivia_titicacasee.jpg",
	"chili_patagonia.jpg",
	"chili_santiago_armas.jpg",
	"chili_santiago_centrum.jpg",
	"ecuador_cuenca_barranco.jpg",
	"ecuador_cuenca_centrum.jpg",
	"ecuador_cuenca_voetbal.jpg",
	"ecuador_guayaquil_dansen.jpg",
	"ecuador_quito.jpg",
	"ecuador_quito_compania.jpg",
	"ecuador_quito_nacht.jpg",
	"peru_arequipa.jpg",
	"peru_cuzco_centrum.jpg",
	"peru_lima.jpg",
	"peru_machu_picchu.jpg",
	"peru_nazca.jpg",
	"peru_winaywayna.jpg"
];
var use = Math.floor(Math.random()*bgs.length);
function doBG() {
	if (!document.body) return;
	if (use >= bgs.length) alert('picked '+use+', but only '+bgs.length+' imgs');
	document.body.background = '/wp-content/themes/aeros_za/gfx/'+bgs[use];
}