var NAV_IE   = 0;
var NAV_OPERA    = 1;
var NAV_NETSCAPE = 2;
var NAV_MAZILLA  = 3;
var NAV_NAUTILUS = 4;
var NAV_FIREFOX  = 5; 
var NAV_GOOGLE   = 6;
var NAV_SAFARI   = 7; 
var V_SHOW = 1;
var V_HIDE = 0;
var nNavigatorType;
var VER_NUMBER = 1.0;
function parseNavigatorType(){
try{
var sUserAgent = window.navigator.userAgent ;
if ( sUserAgent.indexOf("Opera")>0 ){
var n = sUserAgent.indexOf("Opera")+6;
var sVer = sUserAgent.substring(n);
VER_NUMBER = parseFloat(sVer);
return NAV_OPERA;
}
if ( sUserAgent.indexOf("MSIE")>0 ){
var n = sUserAgent.indexOf("MSIE")+5;
var sVer = sUserAgent.substring(n);
n = sVer.indexOf(";");
VER_NUMBER = sVer.substring(0, n);
return NAV_IE;
}
if ( sUserAgent.indexOf("Nautilus/")>0 ){
var n = sUserAgent.indexOf("Nautilus/")+9;
var sVer = sUserAgent.substring(n);
VER_NUMBER = parseFloat(sVer);
return NAV_NAUTILUS;
}
if ( sUserAgent.indexOf("Netscape/")>0 ){
var n = sUserAgent.indexOf("Netscape/");
VER_NUMBER = window.navigator.vendorSub;
return NAV_NETSCAPE;
}
if ( sUserAgent.indexOf("Firefox/")>0 ){
var n = sUserAgent.indexOf("Firefox/");
VER_NUMBER = window.navigator.vendorSub;
return NAV_FIREFOX;
}
if ( sUserAgent.indexOf("Chrome/")>0 ){
var n = sUserAgent.indexOf("Chrome/");
VER_NUMBER = window.navigator.vendorSub;
return NAV_GOOGLE;
}
if ( sUserAgent.indexOf("Safari/")>0 ){
var n = sUserAgent.indexOf("Safari/");
VER_NUMBER = window.navigator.vendorSub;
return NAV_SAFARI;
}
if ( sUserAgent.indexOf("Mozilla")>=0 && sUserAgent.indexOf("rv:")>0 ){
var n = sUserAgent.indexOf("rv:")+3;
var sVer = sUserAgent.substring(n);
n = sVer.indexOf(")");
VER_NUMBER = sVer.substring(0, n);
return NAV_MAZILLA;
}
} catch ( e ) {
}
return NAV_UNKNOW;}
nNavigatorType = parseNavigatorType();
function getNavigatorType(){
return nNavigatorType;}
function getNavigatorVersion(){
return VER_NUMBER;}
function getNavigatorString(){
var sBrowser = ["IE", "Oper",  "Netscape", "Mozilla", "Nautilus", "Firefox","Chrome","Safari"];
return sBrowser[getNavigatorType()];}