if (document.images) {

//these are the nav button rollovers!!!

		overview = new Image();
		overview_down = new Image();
		products = new Image();
		products_down = new Image();
		services = new Image();
		services_down = new Image();
		contact = new Image();
		contact_down = new Image();

		overview.src = "images/overview0.gif";
		overview_down.src = "images/overview1.gif";
		products.src = "images/products0.gif";
		products_down.src = "images/products1.gif";
		services.src = "images/services0.gif";
		services_down.src = "images/services1.gif";
		contact.src = "images/contact0.gif";
		contact_down.src = "images/contact1.gif";

}

function buttonOn(imageName) {
	if (document.images) {
		document[imageName].src = eval(imageName+"_down.src")
	}
}

function buttonOff(imageName) {
	if (document.images) {
		document[imageName].src = eval(imageName+".src")
	}
}