css實現div自動添加縱向滾動條

<div style='border:0px;padding:3px; PADDING:0px; width:200px; height:480px; LINE-HEIGHT: 20px; OVERFLOW: auto; '></div>
overflow-x:scroll是橫的有overflow-y:scroll是豎的有 overflow:scroll橫豎有 overflow:hidden橫豎都沒有