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) {
		system_on = newImage("http://www.wmsracing.com/wmsweb/o2gifs/b_system_on.gif");
		install_on = newImage("http://www.wmsracing.com/wmsweb/o2gifs/b_install_on.gif");
		software_on = newImage("http://www.wmsracing.com/wmsweb/o2gifs/b_software_on.gif");
		tech_on = newImage("http://www.wmsracing.com/wmsweb/o2gifs/b_tech_on.gif");
		about_on = newImage("http://www.wmsracing.com/wmsweb/o2gifs/b_about_on.gif");
		preloadFlag = true;
	}
}