function CookieExists(name)
{
    name += "=";
    var cookies = document.cookie.split(';')
    for(var i=0; i<cookies.length; i++){
        var thisCookie = cookies[i];
        if (thisCookie.charAt(0)==' '){
            thisCookie = thisCookie.substring(1,thisCookie.length);
        }
        if (thisCookie.indexOf(name) == 0){
            return true;    
        }
    }
    return false;
}