var agt=navigator.userAgent.toLowerCase();

// Browser Version:

var is_major = parseInt(navigator.appVersion);
var is_minor = parseFloat(navigator.appVersion);

var is_ns = ((agt.indexOf('mozilla')!=-1) && (agt.indexOf('spoofer')==-1) && (agt.indexOf('compatible') == -1) && (agt.indexOf('opera')==-1) && (agt.indexOf('webtv')==-1));
var is_ns2 = (is_ns && (is_major == 2));
var is_ns3 = (is_ns && (is_major == 3));
var is_ns4 = (is_ns && (is_major == 4));
var is_ns4up = (is_ns && (is_major >= 4));
var is_ns5 = (is_ns && (is_major == 5));
var is_ns5up = (is_ns && (is_major >= 5));

var is_ie = (agt.indexOf("msie") != -1);
var is_ie3 = (is_ie && (is_major < 4));
var is_ie4 = (is_ie && (is_major == 4) && (agt.indexOf("msie 5.0")==-1) && (agt.indexOf("msie 5.5")==-1));
var is_ie4up = (is_ie && (is_major >= 4));
var is_ie5 = (is_ie && (is_major == 4) && (agt.indexOf("msie 5.0")!=-1) || (agt.indexOf("msie 5.5")!=-1));
var is_ie5up = (is_ie && !is_ie3 && !is_ie4);

var is_aol = (agt.indexOf("aol") != -1);
var is_aol3 = (is_aol && is_ie3);
var is_aol4 = (is_aol && is_ie4);

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



// Platform

var is_win = ( (agt.indexOf("win")!=-1) || (agt.indexOf("16bit")!=-1) );
var is_win95 = ((agt.indexOf("win95")!=-1) || (agt.indexOf("windows 95")!=-1));
var is_win16 = ((agt.indexOf("win16")!=-1) || (agt.indexOf("16bit")!=-1) || (agt.indexOf("windows 3.1")!=-1) || (agt.indexOf("windows 16-bit")!=-1) );
var is_win31 = ((agt.indexOf("windows 3.1")!=-1) || (agt.indexOf("win16")!=-1) || (agt.indexOf("windows 16-bit")!=-1));

var is_win98 = ((agt.indexOf("win98")!=-1) || (agt.indexOf("windows 98")!=-1));
var is_winnt = ((agt.indexOf("winnt")!=-1) || (agt.indexOf("windows nt")!=-1));
var is_win32 = (is_win95 || is_winnt || is_win98 || ((is_major >= 4) && (navigator.platform == "Win32")) || (agt.indexOf("win32")!=-1) || (agt.indexOf("32bit")!=-1));

var is_os2 = ((agt.indexOf("os/2")!=-1) || (navigator.appVersion.indexOf("OS/2")!=-1) || (agt.indexOf("ibm-webexplorer")!=-1));

var is_mac= (agt.indexOf("mac")!=-1);
var is_mac68k = (is_mac && ((agt.indexOf("68k")!=-1) || (agt.indexOf("68000")!=-1)));
var is_macppc = (is_mac && ((agt.indexOf("ppc")!=-1) || (agt.indexOf("powerpc")!=-1)));



// Detect IE 4.5 on the mac

var is_ie45mac = (is_mac && is_ie && (agt.indexOf("msie 5.0")==-1) && (agt.indexOf("msie 5.5")==-1) && (agt.indexOf("msie 4.5")!=-1));

// Flash 3, 4 AND 5 Detection

var is_flash5 = 0;
var is_flash4 = 0;
var is_flash3 = 0;


if (navigator.plugins["Shockwave Flash"]) {

var plugin_version = 0;
var plugin_description = navigator.plugins["Shockwave Flash"].description.split(" ");


for (var i = 0; i < plugin_description.length; ++i) {

if (isNaN(parseInt(plugin_description[i])))

continue;

plugin_version = plugin_description[i];

}
}

if (plugin_version >= 5) {

is_flash5 = 1;


} 


if (plugin_version >= 4) {

is_flash4 = 1;


} 


if (plugin_version >= 3) {

is_flash3 = 1;


}


if (is_ie && is_win32) { // Check IE on windows for flash 3, 4 AND 5 using VB Script

document.write('<SCRIPT LANGUAGE="VBScript"\>\n');
document.write('on error resume next\n');
document.write('is_flash5 = (IsObject(CreateObject("ShockwaveFlash.ShockwaveFlash.5")))\n');
document.write('on error resume next\n');
document.write('is_flash4 = (IsObject(CreateObject("ShockwaveFlash.ShockwaveFlash.4")))\n');
document.write('on error resume next\n');
document.write('is_flash3 = (IsObject(CreateObject("ShockwaveFlash.ShockwaveFlash.3")))\n');
document.write('<'+'/SCRIPT> \n');
}