var active = 0;

function slideDown(div){
	var img;
	
	if(active == div){
		slideUp(div);
		active = 0;
	}
	else {
		if(active == 0){
			new Effect.BlindDown('answer_' + div.toString());
			img = document.getElementById('arrow_' + div.toString());
			img.src = 'images/arrow_up.jpg';
			active = div;
		}
		else {
			slideUp(active);	
			new Effect.BlindDown('answer_' + div.toString());
			img = document.getElementById('arrow_' + div.toString());
			img.src = 'images/arrow_up.jpg';
			active = div;
		}
	}
}

function slideUp(div){
	var img;
	
	new Effect.BlindUp('answer_' + div.toString());
	img = document.getElementById('arrow_' + div.toString());
	img.src = 'images/arrow_down.jpg';
}