platform = navigator.platform.toLowerCase();
appname = navigator.appName.toLowerCase();
useragent = navigator.userAgent.toLowerCase();

mac = (platform.indexOf('mac',0) >= 0)? true:false;
win = (platform.indexOf('win',0) >= 0)? true:false;

ns = false;
sfr = false;
ie = false;

if (appname.indexOf('netscape',0) >= 0) {
	if (useragent.indexOf('apple',0) >= 0) {
		sfr = true;
	}
	else {
		ns = true;
	}
}
if (appname.indexOf('microsoft',0) >= 0) {
	ie = true;
}

os9 = false;
osx = false;
os98 = false;
osme = false;
os2000 = false;
osxp = false;

if (mac) {
	if (ns) {
		if ((useragent.indexOf('ppc)',0) >= 0) || (useragent.indexOf('ppc;',0) >= 0)) {
			os9 = true;
		}
		else {
			osx = true;
		}
	}
	else if (sfr) {
		osx = true;
	}
	else {
		if ((useragent.indexOf('msie 4',0) >= 0) || (useragent.indexOf('msie 5.0',0) >= 0) || (useragent.indexOf('msie 5.1',0) >= 0)) {
			os9 = true;
		}
		else {
			osx = true;
		}
	}
}
else {
	if (ns) {
		os98 = (useragent.indexOf('win98',0) >= 0)? true:false;
		osme = (useragent.indexOf('win98',0) >= 0)? true:false;
		os2000 = (useragent.indexOf('windows nt 5.0',0) >= 0)? true:false;
		osxp = (useragent.indexOf('windows nt 5.1',0) >= 0)? true:false;
	}
	else {
		os98 = (useragent.indexOf('windows 98)',0) >= 0)? true:false;
		osme = (useragent.indexOf('win 9x ',0) >= 0)? true:false;
		os2000 = (useragent.indexOf('windows nt 5.0',0) >= 0)? true:false;
		osxp = (useragent.indexOf('windows nt 5.1',0) >= 0)? true:false;
	}
}

ver1 = false;
ver4 = false;
ver5 = false;
ver6 = false;
ver7 = false;

if (ns) {
	ver4 = (useragent.indexOf('mozilla/4',0) >= 0)? true:false;
	ver6 = (useragent.indexOf('netscape6',0) >= 0)? true:false;
	ver7 = (useragent.indexOf('netscape/7',0) >= 0)? true:false;
}
else if (sfr) {
	ver1 = (useragent.indexOf('safari/85',0) >= 0)? true:false;
}
else {
	ver4 = (useragent.indexOf('msie 4',0) >= 0)? true:false;
	ver5 = (useragent.indexOf('msie 5',0) >= 0)? true:false;
	ver6 = (useragent.indexOf('msie 6',0) >= 0)? true:false;
}