How to detect that JavaScript and/or Cookies are disabled?

Question

How to detect that JavaScript or Cookies are disabled in the user\'s browser and notify him any help ?

Answer 1

Assuming JavaScript is enabled, this will tell you if cookies are enabled or not. Works in old browsers.

// returns 1 or 0 instead of true or false. Returns null if inconclusive.
function cookiesEnabled() {
    var i, j, cookies, found;
    if (navigator.cookieEnabled===false) return 0;
    document.cookie = 'testcookiesenabled=1';
    for (i=0; i<2; i++) {
        found = false;
        cookies = document.cookie.split(';');
        j = cookies.length;
        while(j--) {
            while (cookies[j].charAt(0)==' ') {// trim spaces
                cookies[j] = cookies[j].substring(1);
            }
            if (cookies[j].indexOf('testcookiesenabled=')==0) {
                found = true;
                break;
            }
        }
        if (!found) {
            return i;
        }
        // Delete test cookie.
        document.cookie = 'testcookiesenabled=; expires=Thu, 01 Jan 1970 00:00:01 GMT';
    }
    // Results inconclusive.
}

To display a message only when JavaScript is disabled use