// Copyright (C) 2000, Nisus Inc.
//browser version sniffer
var agt=navigator.userAgent.toLowerCase();
var is_major = parseInt(navigator.appVersion);
var is_minor = parseFloat(navigator.appVersion);
var is_nav = ((agt.indexOf('mozilla') !=-1) && (agt.indexOf('spoofer') !==-1) && (agt.indexOf('compatible') !==-1) && (agt.indexOf('opera') !==-1) && (agt.indexOf('webtv') !==-1)); 
var is_nav4up = (is_nav && (is_major >=4));
var is_ie = (agt.indexOf("msie") !=-1);
var is_ie4 = (is_ie && (is_major == 4) && (agt.indexOf("msie 5.0") ==-1) );
var is_ie4up = (is_ie && (is_major >=4));
var is_ie5 = (is_ie && (is_major == 4) && (agt.indexOf("msie 5.0") !=-1) );
//platform version
var is_win = ((agt.indexOf("win") !=-1) || (agt.indexOf ("16bit") !=-1));
var is_Mac = (agt.indexOf("mac") !=-1);