/* 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



// 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, ' ')

	var args = qs.split('&') // parse out name/value pairs separated via &

	

// split out each name=value pair

	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_) {

	// 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

}