/**
 * Author : Osman Mrzljak
 * www.osmanmrzljak.com
 */
/**
 * Sets a Cookie with the given name and value.
 *
 * name       Name of the cookie
 * value      Value of the cookie
 * [expires]  Expiration date of the cookie. Default value is "end of current session"
 * [path]     Path where the cookie is valid for. Default value is "path of calling document"
 * [domain]   Domain where the cookie is valid. Default value is "domain of calling document"
 * [secure]   Boolean value indicating if the cookie transmission requires a
 *              secure transmission
 */
function setCookie(name, value, expires, path, domain, secure)
{
    document.cookie= name + "=" + escape(value) +
        ((expires) ? "; expires=" + expires.toGMTString() : "") +
        ((path) ? "; path=" + path : "") +
        ((domain) ? "; domain=" + domain : "") +
        ((secure) ? "; secure" : "");
}

/**
 * Gets the value of the specified cookie.
 *
 * name  Name of the desired cookie.
 *
 * Returns a string value of specified cookie,
 *   or null if cookie can not be found.
 */
function getCookie(name)
{
    var docck = document.cookie;
    var prefix = name + "=";
    var begin = docck.indexOf("; " + prefix);
    if (begin == -1)
    {
        begin = docck.indexOf(prefix);
        if (begin != 0) return null;
    }
    else
    {
        begin += 2;
    }
    var end = document.cookie.indexOf(";", begin);
    if (end == -1)
    {
        end = docck.length;
    }
    return unescape(docck.substring(begin + prefix.length, end));
}

/**
 * Deletes the specified cookie.
 *
 * name      name of the cookie
 * [path]    path of the cookie. Note: it must be same as path used to create cookie
 * [domain]  domain of the cookie. Note: itmust be same as domain used to create cookie)
 */
function deleteCookie(name, path, domain)
{
    if (getCookie(name))
    {
        document.cookie = name + "=" + 
            ((path) ? "; path=" + path : "") +
            ((domain) ? "; domain=" + domain : "") +
            "; expires=Thu, 01-Jan-70 00:00:01 GMT";
    }
}