// Copyright 2004 AppDepot Web Services Inc.  All Rights Reserved.  This is a licensed product

///<summary>
/// An object for manipulating the querystring
///</summary>
///<type>Class</type>
function QueryString()
{
	this.Attributes = null;
	this.Count = 0;

	this.Init = function()
	{
		var search = top.location.search.substring(1);		
		var pairs = search.split("&");
		this.Count = pairs.length;		
		this.Attributes = new Object();

		for (var i = 0; i < pairs.length; ++i)
		{
			var pair = pairs[i].split("=");
			this.Attributes[pair[0]] = pair[1];	
		}
	}

	this.Init();
	
	///<summary>
	/// Retrieves all of the keys for each of the available querystring options
	///</summary>
	this.Keys = function()
	{
	    var RetVal = new Array();
	    for(var Name in this.Attributes)
	    {
	        RetVal[RetVal.length] = Name; 
	    }
	    return RetVal;
	}
	
	this.Get = function(name)
	{
		return unescape(this.Attributes[name]);
	}
	
	this.Set = function(name, value)
	{
		this.Attributes[name] = escape(value);
	}
	
	this.Remove = function(name)
	{
		this.Attributes[name] = null;
	}
	
	this.ToString = function()
	{
		var pairs = new Array();
		
		for (var key in this.Attributes)
		{
			if (this.Attributes[key] != null)
			{
				pairs.push(key + '=' + this.Attributes[key]);
			}
		}
		
		return pairs.join('&');
	}
	
	this.ToScriptNameString = function ()
	{
		return location.pathname + '?' + this.ToString();	
	}
}