function GerarCookie(strCookie, strValor, lngDias){
    var dtmData = new Date();
    if(lngDias){    
        dtmData.setTime(dtmData.getTime() + (lngDias * 24 * 60 * 60 * 1000));
        var strExpires = "; expires=" + dtmData.toGMTString();
    }else{
        var strExpires = "";
    }
    document.cookie = strCookie + "=" + strValor + strExpires + "; path=/";
}

function LerCookie(strCookie){
    var strNomeIgual = strCookie + "=";
    var arrCookies = document.cookie.split(';');

    for(var i = 0; i < arrCookies.length; i++){
        var strValorCookie = arrCookies[i];
        while(strValorCookie.charAt(0) == ' '){
            strValorCookie = strValorCookie.substring(1, strValorCookie.length);
        }
        if(strValorCookie.indexOf(strNomeIgual) == 0){
            return strValorCookie.substring(strNomeIgual.length, strValorCookie.length);
        }
    }
    return null;
}

function ExcluirCookie(strCookie){
    GerarCookie(strCookie, '', -1);
}