// Browser detection script
var agent = navigator.userAgent.toLowerCase(); 

var is_win = ((agent.indexOf("win") != -1) || (agent.indexOf("16bit") != -1));
var is_mac = (agent.indexOf("mac") != -1);
 
var is_major = parseInt(navigator.appVersion); 
var is_minor = parseFloat(navigator.appVersion); 
var is_nav = ((agent.indexOf('mozilla') != -1) && (agent.indexOf('spoofer') == -1) && (agent.indexOf('compatible') == -1) && (agent.indexOf('opera') == -1) && (agent.indexOf('webtv') == -1)); 
var is_ie = (agent.indexOf("msie") != -1); 

var is_nav4 = (is_nav && (is_major == 4)); 
 
var is_ie4  = (is_ie && (is_major == 4) && (agent.indexOf("msie 5.0")==-1) ); // Includes IE 5.0

// We may need this later on
// var is_ie5up  = (is_ie  && !is_ie3 && !is_ie4); 
// var is_nav5 = (is_nav && (is_major == 5)); 
// var is_nav6up = (is_nav && (is_major >= 6));