Javascript OS client detection with url redirect

OSredir.js

/* Zilli 201507
To detect the operating system on the client machine, 
match the value of navigator.appVersion,
then redirect to OS url with the location.replace value. 
*/

	if (navigator.appVersion.match(/Mac/i)) {
location.replace("index-Mac.html");
}
	else if (navigator.appVersion.match(/Win/i)) {
location.replace("index-Win.html");
}
	else if (navigator.appVersion.match(/UNIX/i)) {
location.replace("index-Unix.html");
}
	else if (navigator.appVersion.match(/Linux/i)) {
location.replace("index-Linux.html");
}