A.disabled B.selectedIndex C.option D.mulitple
A. onmouseover="className=btnPic" B. onmouseover="this.className=btnPic" C. onmouseover="this.style.className=btnPic" D. this.btn.style.className="btnPic"
A.onfocus B.onmouseup C.onmousrover D.onmousmove