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) {
		isebanner_over = newImage("/images/isebanner-over.gif");
		isebanner_down = newImage("/images/isebanner-down.gif");
		isebanner_click = newImage("/images/isebanner-click.gif");
		isehome_over = newImage("/images/isehome-over.gif");
		isehome_down = newImage("/images/isehome-down.gif");
		isehome_click = newImage("/images/isehome-click.gif");
		isesearch_over = newImage("/images/isesearch-over.gif");
		isesearch_down = newImage("/images/isesearch-down.gif");
		isesearch_click = newImage("/images/isesearch-click.gif");
		isenav_down = newImage("/images/isenav-down.gif");
		isenav_click = newImage("/images/isenav-click.gif");
		preloadFlag = true;
	}
}