function showAnswer(i){
    var a = document.getElementById('a' + i);
    var q = document.getElementById('q' + i);
    if(a.className == 'faq-answer-hide'){
        a.className = 'faq-answer-show';
        q.style.background = 'url(/images/skin/faq_minus.gif) top right no-repeat';
    }else{
        a.className = 'faq-answer-hide';
        q.style.background = 'url(/images/skin/faq_plus.gif) top right no-repeat';
    }
}