function getOperatingSystem() {

	var osName="Unknown OS";
	
	if (navigator.appVersion.indexOf("Windows")!=-1) {
		osName="Windows";
	} else if (navigator.appVersion.indexOf("Mac")!=-1) {
		osName="MacOS";
	} else if (navigator.appVersion.indexOf("X11")!=-1) {
		osName="UNIX";
	} else if (navigator.appVersion.indexOf("Linux")!=-1) {
		osName="Linux";
	}
	
	return osName;
}


function getBrowser() {
	return navigator.appName;
}


function supportsVBScript() {

	if ((getBrowser() == "Microsoft Internet Explorer") && (getOperatingSystem() == "Windows")) {
		return true;
	} else {
		return false;
	}

}