선택한 것만 활성화

function change(j)
    {
        var n = document.all('normal');
        var o = document.all('over');

        for(i=0; i<n.length; ++i)
        {
            if(i==j)
            {
                n[i].style.display='none';
                o[i].style.display='block';
            }
            else
            {
                n[i].style.display='block';
                o[i].style.display='none';
            }
        }
    }

다른방법이 없나 ㅡ.ㅡ; 젠장

<img src='./img/detail_01.gif' id='normal' /><img id='over' src='./img/detail_r_01.gif' class='over' border='0' onFocus='this.blur()'>