var useragent=navigator.userAgent;
var navigatorname;
if (useragent.indexOf('MSIE')!= -1)
{
    navigatorname="MSIE";
}
else if (useragent.indexOf('Gecko')!= -1)
{
    if (useragent.indexOf('Chrome')!= -1)
    navigatorname="Google Chrome";
    else navigatorname="Mozilla";
}
else if (useragent.indexOf('Mozilla')!= -1)
{
    navigatorname="old Netscape or Mozilla";
}
else if (useragent.indexOf('Opera')!= -1)
{
    navigatorname="Opera";
}