//detect which browser is used
var detect = navigator.userAgent.toLowerCase();
var OS,browser,version,total,thestring;

if (checkIt('konqueror'))
{
    browser = "Konqueror";
    OS = "Linux";
}
else if (checkIt('safari')) browser = "Safari"
else if (checkIt('omniweb')) browser = "OmniWeb"
else if (checkIt('opera')) browser = "Opera"
else if (checkIt('webtv')) browser = "WebTV";
else if (checkIt('icab')) browser = "iCab"
else if (checkIt('msie')) browser = "IE"
else if (!checkIt('compatible'))
{
    browser = "NS"
    version = detect.charAt(8);
}
else browser = "An unknown browser";
//version of browser
if (!version) version = detect.charAt(place + thestring.length);
//client OS
if (!OS)
{
    if (checkIt('linux')) OS = "Linux";
    else if (checkIt('x11')) OS = "Unix";
    else if (checkIt('mac')) OS = "Mac"
    else if (checkIt('win')) OS = "Windows"
    else OS = "an unknown operating system";
}

//check the string
function checkIt(string)
{
	place = detect.indexOf(string) + 1;
	thestring = string;
	return place;
}