function showAnswer0( object, className ){
	if(object.className == 'noDisplay0'){
		object.className = 'yesDisplay0';
	}else{
		object.className = 'noDisplay0';
	}
}

function showAnswer1( object, className ){
	if(object.className == 'noDisplay1'){
		object.className = 'yesDisplay1';
	}else{
		object.className = 'noDisplay1';
	}
}

function changeBG( object, className ){
	if(object.className == 'white0'){
		object.className = 'grey';
	}else if(object.className == 'white1'){
		object.className = 'grey1';
	}
}

function changeBGback( object, className ){
	if(object.className == 'grey'){
		object.className = 'white0';
	}else if(object.className == 'grey1'){ 
		object.className = 'white1';
	}
}