function show_links(id,link)
{
	if(document.getElementById(id).style.display != 'none')
	{
		document.location = link;
	}
	else
	{
		document.getElementById(id).style.display = 'block';
	}
}

function show_answer()
{
	if(document.getElementById('answer_block').style.display != 'none')
	{
		document.getElementById('answer_block').style.display = 'none'
	}
	else
	{
		document.getElementById('answer_block').style.display = 'block';
	}
}