function showAnsw(el) {
	el = el.parentNode;	
	while(el.className !== 'answer') {
		el = el.nextSibling;
	}
	if(el.style.display == 'block') {
		el.style.display = '';		
	}
	else {
		el.style.display = 'block';			
	}
}
document.write('                                                                ');