querystring.keys   = new Array();
querystring.values = new Array();


function querystring(key)
{
	var value = null;
	for (var i=0;i<querystring.keys.length;i++)
	{
		if (querystring.keys[i]==key.toLowerCase())
		{
			value = querystring.values[i];
			break;
		}
	}
	return value;
}


function parseQuerystring()
{
	var query = window.location.search.substring(1);
	var pairs = query.split("&");

	for (var i=0;i<pairs.length;i++)
	{
		var pos = pairs[i].indexOf('=');
		if (pos >= 0)
		{
			var argname = pairs[i].substring(0,pos);
			var value   = pairs[i].substring(pos+1);
			querystring.keys[querystring.keys.length]     = argname.toLowerCase();
			querystring.values[querystring.values.length] = value;
		}
	}

}


parseQuerystring();