如何定义UL的高度让超过固定高度后自动出现滚动条
.Attopic{display:block; left: 56px; position: absolute; top: 68px; z-index: 999; background: #fff; border: 1px solid #ccc; padding: 2px; width: 180px; height: 100px; overflow-x:hidden; overflow-y:scroll;} .Attopic{display
.Attopic{display:block; left: 56px; position: absolute; top: 68px; z-index: 999; background: #fff; border: 1px solid #ccc; padding: 2px; width: 180px; height: 100px; overflow-x:hidden; overflow-y:scroll;} .Attopic{display
