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                # CSS3 nav-left 屬性 ## 實例 規定在使用方向鍵時向何處導航: ``` button#b1 { top:20%;left:25%; nav-index:1; nav-right:#b2;nav-left:#b4; nav-down:#b2;nav-up:#b4; } button#b2 { top:40%;left:50%; nav-index:2; nav-right:#b3;nav-left:#b1; nav-down:#b3;nav-up:#b1; } button#b3 { top:70%;left:25%; nav-index:3; nav-right:#b4;nav-left:#b2; nav-down:#b4;nav-up:#b2; } button#b4 { top:40%;left:0%; nav-index:4; nav-right:#b1;nav-left:#b3; nav-down:#b1;nav-up:#b3; } ``` ## 瀏覽器支持 目前只有 Opera 支持 nav-left 屬性。 ## 定義和用法 nav-left 屬性規定當使用 nav-left 導航鍵時,向何處進行導航。 | 默認值: | auto | | --- | --- | | 繼承性: | no | | --- | --- | | 版本: | CSS3 | | --- | --- | | JavaScript 語法: | _object_.style.navLeft="#div2" | | --- | --- | ## 語法 ``` nav-left: auto|_id_|_target-name_|inherit; ``` | 值 | 描述 | | --- | --- | | auto | 瀏覽器決定導航到哪個元素。 | | _id_ | 規定被導航元素的 id。 | | _target-name_ | 規定被導航的目標框架。 | | inherit | 規定應從父元素繼承 nav-left 屬性的值。 |
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