var obj = (navigator.appName == 'Netscape' && paseInt(navigator.appVersion) >=4) ? "document." : "document.all.";

function showElement(objName) {
    eval (obj + objName + ".style.visibility = 'visible';"); }    

function hideElement(objName) {
    eval (obj + objName + ".style.visibility = 'hidden';"); }    

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) {
		m_about003 = newImage("images/m_about-03.gif");
		m_prod_m_about = newImage("images/m_prod-m_about.gif");
		m_cust_m_about = newImage("images/m_cust-m_about.gif");
		m_news_m_about = newImage("images/m_news-m_about.gif");
		m_guest_m_about = newImage("images/m_guest-m_about.gif");
		m_cont_m_about = newImage("images/m_cont-m_about.gif");
		m_roll_m_about = newImage("images/m_roll-m_about.gif");
		m_roll_m_prod = newImage("images/m_roll-m_prod.gif");
		m_roll_m_cust = newImage("images/m_roll-m_cust.gif");
		m_roll_m_news = newImage("images/m_roll-m_news.gif");
		m_roll_m_guest = newImage("images/m_roll-m_guest.gif");
		m_roll_m_cont = newImage("images/m_roll-m_cont.gif");
		preloadFlag = true;
	}
}