// Functions to parse query string parameters
// version: 1.0
// written by Kevin Langdon


// #############################################
// function returns the query string part of url
// everything followed by the '?'
function getQueryString() {
    var urlStr = document.location.href;
    var i = urlStr.indexOf("?");
    if (i != -1) {
        return urlStr.substring(i, urlStr.length - 1);
    }
    return null;
}


// #############################################
// function parses the query string and returns each
// parameter and value seperated by '&'
function getParameter(name, defaultValue) {
    if (defaultValue == null) {
        defaultValue = "";
    }

    var url = document.location.href;
    var i = url.indexOf(name + "=");
    if (i != -1) {
        var valuestart = i+name.length+1;
        var valueend = url.length;

        i = url.indexOf("&", valuestart)
        if (i != -1) {
            valueend = i;
        }

        return unescape(url.substring(valuestart, valueend));
    }
    return defaultValue;
}