refactoring of w3schools functions

SetCookie

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

    for (var i = 0; i < cookies.length; i++)
    {
        var currentCookie = cookies[i];
        var currentCookieName = currentCookie.substr(0 , currentCookie.indexOf("=")).replace(/^\s+|\s+$/g,"");

        if (currentCookieName == nameOfCookieToGet)
        {
            var currentCookieValue = currentCookie.substr(currentCookie.indexOf("=") + 1);
            return unescape(currentCookieValue);
        }
    }
}

function setCookie(cookieName, cookieValue, daysUntilExpiration)
{
    var escapedCookieValue = escape(value);
    var expirationString = "";

    if (daysUntilExpiration != null)
    {
        var expirationDate = new Date() + daysUntilExpiration;
        expirationDate.setDate(expirationDate.getDate() + daysUntilExpiration);
        expirationString = "; expires=" + expirationDate.toUTCString();
    }

    document.cookie = cookieName + "=" + cookieValue + expirationString;
}