// JavaScript Document

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

function changeImages() {
	if (document.images ) {
		document[changeImages.arguments[0]].src = changeImages.arguments[1];
	}
}

var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		logo_btn_over = newImage("img/logo_btn_over.jpg");
		about_btn_over = newImage("img/about_btn_over.jpg");
		what_btn_over = newImage("img/what_btn_over.jpg");
		portfolio_btn_over = newImage("img/portfolio_btn_over.jpg");
		links_btn_over = newImage("img/links_btn_over.jpg");
		contact_btn_over = newImage("img/contact_btn_over.jpg");
		equipment_btn_over = newImage("img/equipment_btn_over.jpg");
		certifications_btn_over = newImage("img/certifications_btn_over.jpg");
		asme_btn_over = newImage("img/asme_btn_over.gif");
		preloadFlag = true;
	}
}