var isNS4, isIE4
if (parseInt(navigator.appVersion) >= 4) {
	isNav4 = (navigator.appName == "Netscape")
	isIE4 = (navigator.appName.indexOf("Microsoft") != -1)
}


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_ant_over = newImage("../../images/m_ant-over.gif");
		m_rad_over = newImage("../../images/m_rad-over.gif");
		m_cpe_over = newImage("../../images/m_cpe-over.gif");
		m_tow_over = newImage("../../images/m_tow-over.gif");
		m_wln_over = newImage("../../images/m_wln-over.gif");
		m_tst_over = newImage("../../images/m_tst-over.gif");
		m_sof_over = newImage("../../images/m_sof-over.gif");
		m_cab_over = newImage("../../images/m_cab-over.gif");
		tab_news_over = newImage("../../images/tab_news-over.gif");
		tab_comp_over = newImage("../../images/tab_comp-over.gif");
		tab_specs_over = newImage("../../images/tab_specs-over.gif");
		tab_buy_over = newImage("../../images/tab_buy-over.gif");
		tab_print_over = newImage("../../images/tab_print-over.gif");
		tab_send_over = newImage("../../images/tab_send-over.gif");
		preloadFlag = true;
	}
}