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) {
		head05_2006_04over = newImage("images/head/head05_2006_04over.gif");
		head05_2006_06over = newImage("images/head/head05_2006_06over.gif");
		head05_2006_08over = newImage("images/head/head05_2006_08over.gif");
		head05_2006_09over = newImage("images/head/head05_2006_09over.gif");
		head05_2006_10over = newImage("images/head/head05_2006_10over.gif");
		head05_2006_11over = newImage("images/head/head05_2006_11over.gif");
		head05_2006_12over = newImage("images/head/head05_2006_12over.gif");
		head05_2006_13over = newImage("images/head/head05_2006_13over.gif");
		head05_2006_14over = newImage("images/head/head05_2006_14over.gif");
		head05_2006_15over = newImage("images/head/head05_2006_15over.gif");
		preloadFlag = true;
	}
}