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                # CSS3 background-origin 屬性 ## 實例 相對于內容框來定位背景圖像: ``` div { background-image:url('smiley.gif'); background-repeat:no-repeat; background-position:left; background-origin:content-box; } ``` ## 瀏覽器支持 | IE | Firefox | Chrome | Safari | Opera | | --- | --- | --- | --- | --- | IE9+、Firefox 4+、Opera、Chrome 以及 Safari 5+ 支持 background-origin 屬性。 ## 定義和用法 background-origin 屬性規定 background-position 屬性相對于什么位置來定位。 注釋:如果背景圖像的 background-attachment 屬性為 "fixed",則該屬性沒有效果。 | 默認值: | padding-box | | --- | --- | | 繼承性: | no | | --- | --- | | 版本: | CSS3 | | --- | --- | | JavaScript 語法: | _object_.style.backgroundOrigin="content-box" | | --- | --- | ## 語法 ``` background-origin: padding-box|border-box|content-box; ``` | 值 | 描述 | 測試 | | --- | --- | --- | | padding-box | 背景圖像相對于內邊距框來定位。 | [測試](/tiy/c.asp?f=css_background-origin) | | border-box | 背景圖像相對于邊框盒來定位。 | [測試](/tiy/c.asp?f=css_background-origin&p=2) | | content-box | 背景圖像相對于內容框來定位。 | [測試](/tiy/c.asp?f=css_background-origin&p=3) | ## 相關頁面 CSS3 教程:[CSS3 背景](/css3/css3_background.asp "CSS3 背景")
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