function showAnswer(el, questionNumber)
{
	document.getElementById('biofuelsAnswer1').style.display = 'none';
	document.getElementById('biofuelsAnswer2').style.display = 'none';
	document.getElementById('biofuelsAnswer3').style.display = 'none';
	document.getElementById('biofuelsAnswer4').style.display = 'none';
	document.getElementById('biofuelsAnswer5').style.display = 'none';
	document.getElementById('biofuelsAnswer6').style.display = 'none';
	document.getElementById('biofuelsAnswer7').style.display = 'none';
	document.getElementById('biofuelsAnswer8').style.display = 'none';
	
	document.getElementById('question1').className = '';
	document.getElementById('question2').className = '';
	document.getElementById('question3').className = '';
	document.getElementById('question4').className = '';
	document.getElementById('question5').className = '';
	document.getElementById('question6').className = '';
	document.getElementById('question7').className = '';
	document.getElementById('question8').className = '';
	
	//if(document.getElementById('biofuelsAnswer' + questionNumber).style.display == 'none' || 
	//	document.getElementById('biofuelsAnswer' + questionNumber).style.display == '')
	document.getElementById('biofuelsAnswer' + questionNumber).style.display = 'block';
	el.className = 'selected';
}