/**
 * 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: end of current session)
 * [path]     Path where the cookie is valid (default: path of calling document)
 * [domain]   Domain where the cookie is valid
 *              (default: 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 containing value of specified cookie,
 *   or null if cookie does not exist.
 */
//function getCookie(name)
//{
//    var dc = document.cookie;
//    var prefix = name + "=";
//    var begin = dc.indexOf("; " + prefix);
//    if (begin == -1)
//    {
//        begin = dc.indexOf(prefix);
//        if (begin != 0) return null;
//    }
//    else
//    {
//        begin += 2;
//    }
//    var end = document.cookie.indexOf(";", begin);
//    if (end == -1)
//    {
//        end = dc.length;
//    }
//    return unescape(dc.substring(begin + prefix.length, end));
//}

/**
 * Deletes the specified cookie.
 *
 * name      name of the cookie
 * [path]    path of the cookie (must be same as path used to create cookie)
 * [domain]  domain of the cookie (must 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";
    }
}



function check_sig(){
    cookie_name = 'igbl_auth';
    //alert("cookie => " + cookie_name + ' = ' + getCookie(cookie_name));
    if( getCookie(cookie_name) != "AU")
         top.location="http://registro.ig.com.br/igbl/auth/iniciaauth.php?stp=igradio";
    return true;
}

function getCookie(name) {
    name += "=";
    var i = 0;
    while (i < cookieIGBL.length) {
      var offset = i + name.length;
      if (cookieIGBL.substring(i, offset) == name) { 
        var endstr = cookieIGBL.indexOf(";", offset); 
        if (endstr == -1) endstr = cookieIGBL.length;
        return unescape(cookieIGBL.substring(offset, endstr));
      }
      i = cookieIGBL.indexOf(" ", i) + 1; 
      if (i == 0) break; 
    }
    return null; 
}