var isNS4 = (document.layers) ? true : false;
var isDOM = document.getElementById //DOM1 browser (MSIE 5+, Netscape 6, Opera 5+)
var isIE5 = (document.all && isDOM) ? true : false; // IE5
var isNS6 = (!document.all && isDOM) ? true : false; // NS6
var isOpera = window.opera //Opera
var isOpera5 = isOpera && isDOM //Opera 5+
var isOpera6=isOpera && window.print //Opera 6+
var isOpera7=isOpera && document.readyState //Opera 7
var isMozilla=isDOM && navigator.appName=="Netscape"

function RollOver(def,folder) {
	if(isNS4) {
	eval('document.images.' + def + '.src = "/img/' + folder + '/a-' + def + '.gif";');
	} else {
		ElMenuItem = document.getElementById(def);
		if(ElMenuItem){ElMenuItem.src = "/img/" + folder + "/a-" + def + ".gif";}
	}
}

function RollOut(def,folder) {
	if(isNS4) {
	eval('document.images.' + def + '.src = "/img/' + folder + '/' + def + '.gif";');
	} else {
		ElMenuItem = document.getElementById(def);
		if(ElMenuItem){ElMenuItem.src = "/img/" + folder + "/" + def + ".gif";}
	}
}