function GetLocalTimeOffset()
{
    var rightNow = new Date();
    var date1 = new Date(rightNow.getFullYear(), 0, 1, 0, 0, 0, 0);
    var temp = date1.toGMTString();
    
    var date2 = new Date(temp.substring(0, temp.lastIndexOf(" ")-1));
    var hoursDiffStdTime = (date1 - date2) / (1000 * 60 * 60);
    createCookie("HoursDiffStdTime", hoursDiffStdTime, 0); 
}

function createCookie(name, value, days) 
{
    if (days && days > 0) 
    {
        var date = new Date();
        date.setTime(date.getTime()+(days*24*60*60*1000));
        var expires = "; expires="+date.toGMTString();
    }
    else 
    {
        var expires = "";
    }

    var cookieName = name + "=" + value + expires + "; path=/";
    document.cookie = cookieName;
}