var now = new Date();
var nowHours = now.getHours();
var akiBG = document.getElementById('container_outer');

if (nowHours > 5 && nowHours < 19) {
	akiBG.style.background = "url(/themes/2009.07/bg_day.png) repeat-x";
} else {
	akiBG.style.background = "url(/themes/2009.07/bg_night.png) repeat-x";
}