last_pic_stored = "1";


function pic_toggle(answer, elem) {
		
		if(last_pic_stored == answer)
			return;
		
		if(last_pic_stored != "0")
		{
			document.getElementById(elem + last_pic_stored).style.display = 'none';
			
			document.getElementById(elem + last_pic_stored + "-button").className = 'off';
			
		}
		
		if(answer == last_pic_stored){
			document.getElementById(elem + answer).style.display = 'none';
			document.getElementById(elem + answer).className = 'off';
			
			last_pic_stored = "0";
			return;
		}else{
			document.getElementById(elem + answer).style.display = 'block';
			
			document.getElementById(elem + answer + "-button").className = 'on';
			
			
		}
		
		last_pic_stored = answer;
}