function switch_header() {
	random_num = (Math.round((Math.random()*10)+1))
	document.getElementById('layer1').style.background="#02349b url(img/bg"+random_num+".jpg)";
	document.getElementById('layer1').style.backgroundRepeat="no-repeat";
}

function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

function changeImages() {
	if (document.images && (preloadFlag == true)) {
		for (var i=0; i<changeImages.arguments.length; i+=2) {
			document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
		}
	}
}

var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		thegallery_01_over = newImage("/img/nav/thegallery_01-over.gif");
		news_01_over = newImage("/img/nav/news_01-over.gif");
		aboutme_01_over = newImage("/img/nav/aboutme_01-over.gif");
		home_01_over = newImage("/img/nav/home_01-over.gif");
		djmixes_over = newImage("/img/nav/djmixes_dj-mixes-over.gif");
		preloadFlag = true;
	}
}