//alert(navigator.appVersion)
function isWindows()
{
	return (navigator.appVersion.indexOf("Win") != -1)
}
function isWin95NT()
{
	return (isWindows() && (navigator.appVersion.indexOf("Win16") == -1 && 
		navigator.appVersion.indexOf("Windows 3.1") == -1))
}
function isMac()
{
	return (navigator.appVersion.indexOf("Mac") != -1)
}
function isMacPPC()
{
	return (isMac() && (navigator.appVersion.indexOf("PPC") != -1 || 
		navigator.appVersion.indexOf("PowerPC") != -1))
}
function isUnix()
{
	return (navigator.appVersion.indexOf("X11") != -1)
}
function isNav()
{
	return (navigator.appName == "Netscape")
}
function isGeneration2()
{
	return (navigator.appVersion.charAt(0) == "2")
}
function isGeneration3()
{
	return (navigator.appVersion.charAt(0) == "3")
}
function isGeneration3Min()
{
	return (parseInt(navigator.appVersion.charAt(0)) >= 3)
}
function isNav4_02()
{
	return (isNav() && (navigator.appVersion.substring(0,4) == "4.02"))
}
function isMSIE3Min()
{
	return (navigator.appVersion.indexOf("MSIE") != -1)
}