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) {
		id01_over = newimage("../images/vintage/01-over.gif");
		id01_down = newimage("../images/vintage/01-down.gif");
		id02_over = newimage("../images/vintage/02-over.gif");
		id02_down = newimage("../images/vintage/02-down.gif");
		id02_03_over = newimage("../images/vintage/02-03_over.gif");
		id02_03_down = newimage("../images/vintage/02-03_down.gif");
		id02_01_over = newimage("../images/vintage/02-01_over.gif");
		id02_01_down = newimage("../images/vintage/02-01_down.gif");
		id03_over = newimage("../images/vintage/03-over.gif");
		id03_down = newimage("../images/vintage/03-down.gif");
		preloadflag = true;
	}
}