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) && (agt.indexOf('hotjava')==-1));
	var is_nav2 = (is_nav && (is_major == 2));
    var is_nav3 = (is_nav && (is_major == 3));
    var is_nav4 = (is_nav && (is_major == 4));
    var is_nav4up = (is_nav && (is_major >=4));
	var is_navonly = (is_nav && ((agt.indexOf(";nav") != -1) || (agt.indexOf("; nav") != -1)) );
    var is_nav6 = (is_nav && (is_major == 5));
    var is_nav6up = (is_nav && (is_major >= 5));
    var is_gecko = (agt.indexOf('gecko') != -1);

var is_ie     = ((agt.indexOf("msie") != -1) && (agt.indexOf("opera") == -1) && (agt.indexOf("aol") == -1));
    var is_ie3    = (is_ie && (is_major < 4));
    var is_ie4    = (is_ie && (is_major == 4) && (agt.indexOf("msie 4")!=-1) );
    var is_ie4up  = (is_ie && (is_major >= 4));
    var is_ie5    = (is_ie && (is_major == 4) && (agt.indexOf("msie 5.0")!=-1) );
	var is_ie5_5  = (is_ie && (is_major == 4) && (agt.indexOf("msie 5.5") !=-1));
	var is_ie5up  = (is_ie && !is_ie3 && !is_ie4);
    var is_ie5_5up =(is_ie && !is_ie3 && !is_ie4 && !is_ie5);
    var is_ie6    = (is_ie && (is_major == 4) && (agt.indexOf("msie 6.0")!=-1) );
    var is_ie6up  = (is_ie && !is_ie3 && !is_ie4 && !is_ie5 && !is_ie5_5 && !is_ie6);

var is_aol   = (agt.indexOf("aol") != -1);
    var is_aol3  = (is_aol && is_ie3);
    var is_aol4  = (is_aol && is_ie4);
    var is_aol5  = (agt.indexOf("aol 5") != -1);
    var is_aol6  = (agt.indexOf("aol 6") != -1);
	var is_aol7  = (agt.indexOf("aol 7") != -1);

    var is_opera = (agt.indexOf("opera") != -1);
    var is_opera2 = (agt.indexOf("opera 2") != -1 || agt.indexOf("opera/2") != -1);
    var is_opera3 = (agt.indexOf("opera 3") != -1 || agt.indexOf("opera/3") != -1);
    var is_opera4 = (agt.indexOf("opera 4") != -1 || agt.indexOf("opera/4") != -1);
    var is_opera5 = (agt.indexOf("opera 5") != -1 || agt.indexOf("opera/5") != -1);
    var is_opera5up = (is_opera && !is_opera2 && !is_opera3 && !is_opera4);

var is_webtv = (agt.indexOf("webtv") != -1); 

var is_TVNavigator = ((agt.indexOf("navio") != -1) || (agt.indexOf("navio_aoltv") != -1)); 
    var is_AOLTV = is_TVNavigator;

var is_hotjava = (agt.indexOf("hotjava") != -1);
    var is_hotjava3 = (is_hotjava && (is_major == 3));
    var is_hotjava3up = (is_hotjava && (is_major >= 3));


if (is_gecko && !is_nav6up) {
   var myBro = "detected>>netscape navigator 6.0 or mozilla"
}
else if (is_nav2) {
   var myBro = "detected>>netscape navigator 2.0";
}
else if (is_nav3) {
   var myBro = "detected>>netscape navigator 3.0";
}
else if (is_nav4 && !is_nav4up) {
   var myBro = "detected>>netscape navigator 4.0"
}
else if (is_nav4up && !is_nav6 && !is_nav6up) {
   var myBro = "detected>>netscape navigator 4.0 or later"
}
else if (is_nav6) {
   var myBro = "detected>>netscape navigator 6.0"
}
else if (is_nav6up && is_nav4up && is_gecko) {
   var myBro = "detected>>netscape navigator 6.0 or later"
}
else if (is_ie3) {
   var myBro = "detected>>internet explorer 3.0 or later";
}
else if (is_ie4) {
   var myBro = "detected>>internet explorer 4.0"
}
else if (is_ie4up && !is_ie5 && !is_ie5up && !is_ie5_5 && !is_ie5_5up && !is_ie6 && !is_ie6up) {
   var myBro = "detected>>internet explorer 4.0 or later"
}
else if (is_ie5) {
   var myBro = "detected>>internet explorer 5.0"
}
else if (is_ie5up && is_ie4up && !is_ie5_5 && !is_ie5_5up && !is_ie6 && !is_ie6up) {
   var myBro = "detected>>internet explorer 5.0 or later"
}
else if (is_ie5_5) {
   var myBro = "detected>>internet explorer 5.5"
}
else if (is_ie5_5up && is_ie4up && is_ie5up && !is_ie6 && !is_ie6up) {
   var myBro = "detected>>internet explorer 5.5 or later"
}
else if (is_ie6) {
   var myBro = "detected>>internet explorer 6.0"
}
else if (is_ie6up && is_ie4up && is_ie5up && is_ie5_5up) {
   var myBro = "detected>>internet explorer 6.0 or later"
}
else if (is_aol3) {
   var myBro = "detected>>aol 3.0 or later";
}
else if (is_aol4) {
   var myBro = "detected>>aol 4.0 or later"
}
else if (is_aol5) {
   var myBro = "detected>>aol 5.0 or later"
}
else if (is_aol6) {
   var myBro = "detected>>aol 6.0 or later"
}
else if (is_aol7) {
   var myBro = "detected>>aol 7.0 or later"
}
else if (is_opera2) {
   var myBro = "detected>>opera 2.0 or later";
}
else if (is_opera3) {
   var myBro = "detected>>opera 3.0 or later";
}
else if (is_opera4) {
   var myBro = "detected>>opera 4.0 or later";
}
else if (is_opera5) {
   var myBro = "detected>>opera 5.0 or later"
}
else if (is_opera5up) {
   var myBro = "detected>>opera 5.0 or later"
}
else if (is_webtv) {
   var myBro = "detected>>webtv"
}
else if (is_TVNavigator) {
   var myBro = "detected>>TVNavigator";
}
else if (is_hotjava3) {
   var myBro = "detected>>hotjava 3.0";
}
else if (is_hotjava3up) {
   var myBro = "detected>>hotjava 3.0 or later";
}
else {
   var myBro = "detected>>unknown browser";
}