function queryString(qs)
{
	var s = location.href;
	var startIndex = s.indexOf('?');
	var requestURI = s.substring(startIndex+1);
   	var sArr = requestURI.split('&');
	for (i in sArr)
	{
		var ssArr = sArr[i].split('=')
		if (ssArr[0] == qs)
		{
			return ssArr[1];	
		}
	}
}