function $RF(el, radioGroup) 
{
	if($(el).type && $(el).type.toLowerCase() == 'radio') 
	{
		var radioGroup = $(el).name;
		var el = $(el).form;
	}
	else if ($(el).tagName.toLowerCase() != 'form')
	{
		return false;
	}

	var checked = $(el).getInputs('radio', radioGroup).find(
			function(re) {return re.checked;}
	);
	return (checked) ? $F(checked) : null;
}

function selected_value(selBox) 
{
	return selBox.options[selBox.selectedIndex].value;
}

function popup(url)
{
	id = "about";
	eval("page" + id + " = window.open(url, '" + id + "', 'toolbar=0,scrollbars=1,location=0,statusbar=0,menubar=0,resizable=0,width=400,height=600,left = 440,top = 100');");
}