jQuery.fn.fadeToggle = function(speed, easing, callback) {
    return this.animate({opacity: 'toggle'}, speed, easing, callback);  
};
$(function() {
    $("#answer .views-row").hide();
    $("#question .views-row").click(function(){
        var i = $(this).index();
        $("#answer .views-row").eq(i).toggle("slow").siblings().hide();
    });
});