Clearing all cookies with JavaScript

function deleteAllCookies() {
    var cookies = document.cookie.split(";");

    for (var i = 0; i < cookies.length; i++) {
        var cookie = cookies[i];
        var eqPos = cookie.indexOf("=");
        var name = eqPos > -1 ? cookie.substr(0, eqPos) : cookie;
        document.cookie = name + "=;expires=Thu, 01 Jan 1970 00:00:00 GMT";
    }
}

Note that this code has two limitations:

• It will not delete cookies with HttpOnly flag set, as the HttpOnly flag disables Javascript’s access to the cookie.
• It will not delete cookies that have been set with a Path value. (This is despite the fact that those cookies will appear in document.cookie, but you can’t delete it without specifying the same Path value with which it was set.)