/* 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
	this.keys=Querystring_keys
	
	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
			
		var curVal = this.params[name];			
		try {
			if ( curVal.length != 0 ) 
			{
				value = curVal + "*|*" + value;
			}
		} catch ( err) {
		
		}
		
		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
}

function Querystring_keys() 
{
	var keys = new Array();
	var j=0;
	for (var i in this.params)
	{		
		keys[j] = i;
		j++;
	}


	return keys;
}