/* Client-side access to querystring name=value pairs
	Version 1.2.2
	30 Mar 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
// Turn <plus> back to <space>
// See: http://www.w3.org/TR/REC-html40/interact/forms.html#h-17.13.4.1
	qs = qs.replace(/\+/g, ' ')
// parse out name/value pairs separated via &
	var args = qs.split('&')
	
// split out each name=value pair
	for (var i=0;i<args.length;i++)
	{
		var pair = args[i].split('=')
		name = unescape(pair[0])
		var value
		if (pair.length == 2)
			value = unescape(pair[1])
		else
			value = name
		
		this.params[name] = value
	}
}
function Querystring_get(key, default_) // 'default' defaults to null
{
	// This silly looking line changes UNDEFINED to NULL
	if (default_ == null) default_ = null;
	
	var value=this.params[key]
	if (value==null){value=default_}
	
	return value
}