function querystring(name)
{
    var href = location.href;
    var hrefs = href.split("?");
    if (hrefs.length > 1)
    {
        var qstrings = hrefs[1].split("&");
        for (var i = 0; i < qstrings.length; i++)
        {
            var thisq = qstrings[i].split("=");
            if (thisq.length > 1)
            {
                if (thisq[0] == name) {return thisq[1];}
            }
            else
            {
                if (thisq[0] == name) {return true;}
            }
        }
    }
    else
    {
        return null;    
    }
}

function querystringUrl(url,name)
{
    var href = url;
    var hrefs = href.split("?");
    if (hrefs.length > 1)
    {
        var qstrings = hrefs[1].split("&");
        for (var i = 0; i < qstrings.length; i++)
        {
            var thisq = qstrings[i].split("=");
            if (thisq.length > 1)
            {
                if (thisq[0] == name) { return thisq[1]; }
            }
            else
            {
                if (thisq[0] == name) { return true; }
            }
        }
    }
    else
    {
        return null;
    }
}