function toggleAnswer(layer,state)
{
	var style2 = document.getElementById(layer).style;
	if (state == 'on')
	{
		style2.display = "block";
	}
	else
	{
		style2.display = "none";
	}
}
var answers=new Array(10);
answers[1]='d';
answers[2]='b';
answers[3]='a';
answers[4]='c';
answers[5]='d';
answers[6]='a';
answers[7]='d';
answers[8]='c';
answers[9]='d';
answers[10]='b';