redirect chatango to html5 or flash

chatango_redirect.user.js

// ==UserScript==
// @name        chatango redirect
// @namespace   2pichubros_chatango
// @description redirects to html or flash automatically
// @include     /(http|https):\/\/.*?\.chatango.com\/$/
// @version     2
// @grant       none
// ==/UserScript==
blacklist = []; //Add users/chats that you would not like to have redirected here
url = window.location.href;
user = url.split(".")[0].split("://")[1]
mode = "html5"; //set to either html5 or flash depending on what you want to redirect to
if (blacklist.indexOf(user) >= 0){
	console.log("redirect in blacklist... passing")
	return "Blocked"
}
else{
	if (mode == "html5"){
		mode = "?js"
	}
	else if (mode == "flash"){
		mode = "?flash"
	}
	window.location.href = window.location.href+mode;
}