border-top-style：<line-style>
<line-style> = none | hidden | dotted | dashed | solid | double | groove | ridge | inset | outset
默認(rèn)值：none
適用于：所有元素
繼承性：無
動畫性：否
計算值：指定值
相關(guān)屬性：[ border-style ] || [ border-right-style ] || [ border-bottom-style ] || [ border-left-style ]
| Values | IE | Firefox | Chrome | Safari | Opera | iOS Safari | Android Browser | Android Chrome |
|---|---|---|---|---|---|---|---|---|
| Basic Support | 6.0+ | 2.0+ | 4.0+ | 3.1+ | 3.5+ | 3.2+ | 2.1+ | 18.0+ |
| hidden | 6.0-7.0 | |||||||
| 8.0+ | ||||||||
| dotted | 6.0 #1 | |||||||
| 7.0+ |