function checkAnswer(question, answerCount)
{
	var i = 0;
	var answer = -1;
	
	for (i=0; i<answerCount; i++)
	{
		var obj = document.getElementById('q'+question+'_'+i);
		
		if (obj != null && obj.checked)
			answer = obj.value;
	}		
		
	ajax_request("get_answer.php?question="+question, 
		function(correctAnswer) 
		{ 
			if (correctAnswer == answer)
				document.getElementById("preview"+question).innerHTML = '<span class="correct">Correct!</span>';
			else
				document.getElementById("preview"+question).innerHTML = '<span class="wrong">Wrong!</span>';
		},
		function() { document.getElementById("preview"+question).innerHTML = "Error getting answer."; }
	);
}