function PageQuery(q)
{
	this.q = (q.length > 1) ? q.substring(1, q.length) : null;
	this.keyValuePairs = new Array();
	if(this.q)
	{
		for(var i=0; i < this.q.split("&").length; i++)
		{
			this.keyValuePairs[i] = this.q.split("&")[i];
		}
	}
	this.getKeyValuePairs = function() 
	{ 
		return this.keyValuePairs;
	}
	this.getValue = function(s)
	{
		for(var j=0; j < this.keyValuePairs.length; j++)
		{
			if (this.keyValuePairs[j].split("=")[0] == s)
			{
				return this.keyValuePairs[j].split("=")[1];
			}
		}
		return null;
	}
	this.getParameters = function()
	{
		var a = new Array(this.getLength());
		for(var j=0; j < this.keyValuePairs.length; j++)
		{
			a[j] = this.keyValuePairs[j].split("=")[0];
		}
		return a;
	}
	this.getLength = function()
	{ 
		return this.keyValuePairs.length;
	}
}
function queryString(key)
{
	var page = new PageQuery(window.location.search);
	return unescape(page.getValue(key));
}