function getCookieVal(offset)
{
        var endstr = document.cookie.indexOf(";", offset);
        if(endstr == -1)
                endstr = document.cookie.length;

        return unescape(document.cookie.substring(offset, endstr));
}


function getCookie(name)
{
        var arg = name + "=";
        var alen = arg.length;
        var clen = document.cookie.length;

        var i = 0;
        while(i < clen)
        {
                var j = i + alen;
                if(document.cookie.substring(i, j) == arg)
                        return getCookieVal(j);

                i = document.cookie.indexOf(" ", i) + 1;
                if(i == 0)
                        break;
        }

        return null;
}

function setCookie(name, value)
{
        var argv = setCookie.arguments;
        var argc = setCookie.arguments.length;
        var expiredays = (argc > 2) ? argv[2] : null;
        var path = (argc > 3) ? argv[3] : null;
        var domain = (argc > 4) ? argv[4] : null;
        var secure = (argc > 5) ? argv[5] : false;
        
        var todayDate = new Date;
        var dueDate = new Date;
        dueDate.setDate( todayDate.getDate() + expiredays); 

        document.cookie = name + "=" + escape(value) +
                ((expiredays == null) ? "" : ("; expires=" + dueDate.toGMTString())) +
                ((path == null) ? "" : ("; path=" + path)) +
                ((domain == null) ? "" : ("; domain=" + domain)) +
                ((secure == true) ? "; secure" : "");
}

function deleteCookie(name)
{
        var exp = new Date();
        exp.setTime(exp.getTime() - 1);
        var cval = getCookie(name);
        document.cookie = name + "=" + cval + "; expires=" + exp.toGMTString();
}