// User Agent Config

function UA() {
	this.plat = (navigator.appVersion.indexOf('Mac') > -1) ? 'mac' : 'win';
	this.brow = (navigator.appName.indexOf('Microsoft') > -1) ? 'ie' : 'nn';
	this.ver = (navigator.appVersion.charAt(0));
	return this;
}

ua = new UA();

var nn4 = (navigator.appName.indexOf('Netscape') > -1) && (navigator.appVersion.charAt(0) == 4);