var question_bar_normal='question_bar'; //css class adư
	var question_bar_dropped='question_bar_dropped'; //css class adư
	function prepare()
	{
		var container=document.getElementById('container');
		var faqs=document.getElementById('faqs');
		
		if(faqs.offsetHeight<345) container.style.height='345px'; else  container.style.height=faqs.offsetHeight+'px';
	}
	function all_answers_hide()
	{
		for(i=0;document.getElementById('question'+i);i++)
		{
			document.getElementById('question'+i).className=question_bar_normal;
			document.getElementById('answer'+i).style.display='none';
		}
		prepare();
	}
	function view_answer(index)
	{
		if(document.getElementById('question'+index).className==question_bar_normal)
		{
			all_answers_hide();
			document.getElementById('answer'+index).style.display='block';
			document.getElementById('question'+index).className=question_bar_dropped;
		}
		else
			all_answers_hide();
		prepare();
	}