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                ## border-top 屬性 ### 屬性定義及使用說明 border-top 簡寫屬性把上邊框的所有屬性設置到一個聲明中 可以按順序設置如下屬性: border-top-width, border-top-style, and border-top-color. 如果不設置其中的某個值,也不會出問題,比如 border-top:solid #ff0000; 也是允許的。 JavaScript 語法:object.style.borderTop="3px solid blue" * * * ## 瀏覽器支持 表格中的數字表示支持該屬性的第一個瀏覽器版本號。 | 屬性 | ? | ? | ? | ? | ? | | --- | --- | --- | --- | --- | --- | | border-top | 1.0 | 4.0 | 1.0 | 1.0 | 3.5 | * * * ## 屬性值 | 值 | 描述 | | --- | --- | | *border-top-width* | 規定上邊框的寬度。參閱:[border-top-width](https://www.w3cschool.cn/cssref/pr-border-top-width.html "CSS border-top-width 屬性") 中可能的值。 | | *border-top-style* | 規定上邊框的樣式。參閱:[border-top-style](https://www.w3cschool.cn/cssref/pr-border-top-style.html "CSS border-top-style 屬性") 中可能的值。 | | *border-top-color* | 規定上邊框的顏色。參閱:[border-top-color](https://www.w3cschool.cn/cssref/pr-border-top-color.html "CSS border-top-color 屬性") 中可能的值。 | | inherit | 規定應該從父元素繼承 border-top 屬性的設置。 | * * * ## 實例--設置上邊框的樣式: ``` <!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>W3Cschool教程(w3cschool.cn)</title> <style> p { border: medium double rgb(250,0,255) } </style> </head> <body> <p>This is some text in a paragraph.</p> </body> </html> ```
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