var version_unknown = 'unknown';
var version_macosx_107 = 7;
var version_macosx_106 = 6;
var version_macosx_105 = 5;
var version_macosx_104 = 4;	

var agent = navigator.userAgent;
var re    = /10[\._](\d)/gi;
var match = re.exec(agent);
var version = version_unknown;

if (match != null)
{
	version = match[1];
}

// uses User Agent string to select correct version of sofware depending on OS version
function selectVersion()
{			
	if(version != version_unknown)
	{
		location.href = "/downloadthanks.php"; 
	}
	else
	{
		location.href = "/download"; 		
	}
}	

function displayVersion()
{
	if(version >= version_macosx_105)
	{
		document.write('2.11 - Mac OS X'); 
	}
	else if (version >= version_macosx_104)
	{
		document.write('2.9.6 - Mac OS X (Intel & PowerPC)'); 
	}
}

function handledVersion()
{			
	return version != version_unknown;
}

function displayIfHandled(text)
{
	if (handledVersion())
		document.write(text);
}