A.noshade B.width C.bold D.size
A.location,history B.window,location C.navigator,window D.historylist,location
A.單選按鈕可以通過單擊“選種”和“未選中”選項(xiàng)來進(jìn)行切換 B.單選按鈕沒有checked屬性 C.單選按鈕支持onClick事件 D.單選按鈕的Length屬性返回一個(gè)選項(xiàng)組中單選項(xiàng)的個(gè)數(shù)