Checking if cookies are enabled doesn't work in IE8

Question

Hi,

I'm trying to create a script that would determine if cookies are enabled and do some work if not. This is the code I use:

    var cookieEnabled = (window.navigator.cookieEnabled) ? true : false;

    if (typeof navigator.cookieEnabled == "undefined" && !cookieEnabled) {
        document.cookie = "testcookie"
        cookieEnabled = (document.cookie.indexOf("testcookie") != -1) ? true : false
    }

    if (cookieEnabled == false) {
        // do some work
    }

The problem is that in IE8 it causes nothing to happen when I set cookies to be blocked in browser options. So, navigator.cookieEnabled is always true. This stuff works perfectly in Chrome and FireFox. Am I doing anything wrong?