var Injector = (function () {
    var container = [], registry = [];
    function getInjectableByName(name) {
        return container
            .filter(function(injectable){ return Object.keys(injectable)[0] === name; })
            .map(function(injectable){ return injectable[name]; })[0];
    }
    return {
        apply: function () {
            for( var i in registry) {
                var args = registry[i].args, observer = registry[i].observer;
                for (var j in args) {
                    var arg = args[j], name = Object.keys(arg)[0];
                    observer[name] = getInjectableByName(arg[name]);
                }
            }
        },
        register: function (name, obj) {
            if (container.filter(function (item) {return !!item[name];}).length > 0) {
                throw new Error('Can\'t register more than one ' + name);
            }
            var injectable = {};
            injectable[name] = obj;
            container.push(injectable);
            this.apply();
        },
        inject: function () {
            var observer, _args = arguments, args = Object.keys(_args)
                .filter(function (key) {return parseInt(key) >= 0;})
                .map(function (key) {return _args[key];});
            observer = args.pop();
            registry.push({args: args, observer: observer});
            this.apply();
        }
    };
})();

Injector.register('Company', {name:'XXXX'});

function Person() {
    this.company = null;

    Injector.inject({'company':'Company'}, this);
}

var person = new Person();
console.log(person.company);