/* Client-side access to querystring name=value pairs
    Version 1.2.3
    22 Jun 2005
    Adam Vandenberg
*/
function Querystring(qs) { // optionally pass a querystring to parse
    this.params = new Object()
    this.get=Querystring_get
    
    if (qs == null)
        qs=location.search.substring(1,location.search.length)

    if (qs.length == 0) return


    qs = qs.replace(/\+/g, ' ')
    var args = qs.split('&')
    

    for (var i=0;i< args.length;i++) {
        var value;
        var pair = args[i].split('=')
        var name = unescape(pair[0])

        if (pair.length == 2)
            value = unescape(pair[1])
        else
            value = name
        
        this.params[name] = value
    }
}

function Querystring_get(key, default_) {
    
    if (default_ == null) default_ = null;
    
    var value=this.params[key]
    if (value==null) value=default_;
    
    return value
}