function getCookie(curr_cntl)
{
    if(document.cookie.length > 0)
    {
        var start=document.cookie.indexOf(curr_cntl+"=");
        if(start != -1)
        {
            start = start + curr_cntl.length+1;
            var end = document.cookie.indexOf(";", start);
            if(end == -1)
                end=document.cookie.length;
            return unescape(document.cookie.substring(start, end));
        }
    }
    
    return "";
}

function setCookie(curr_cntl, value, numdays)
{
    var exp_date = new Date();
    exp_date.setDate(exp_date.getDate()+numdays);
    var val = curr_cntl + "=" + escape(value) +
        ((numdays==null) ? "" : ";expires="+exp_date.toGMTString());

    document.cookie = val;
}