function PageQuery(q) 
	{
		if(q.length > 1) 
			this.q = q.substring(1, q.length);
		else 
			this.q = null;

		this.keyValuePairs = new Array();
		if(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 false;
			}
		
		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 getQueryString(key)
	{
		var page = new PageQuery(window.location.search); 
		return unescape(page.getValue(key)); 
	}