function getQueryString(index) {
	var paramExpressions;
	var param
	var val
	paramExpressions = window.location.search.substr(1).split("&");
	if (index < paramExpressions.length) {
		param = paramExpressions[index]; 
		if (param.length > 0) {
			return eval(unescape(param));
		}
	}
	return ""
}