<ruby id="bdb3f"></ruby>

    <p id="bdb3f"><cite id="bdb3f"></cite></p>

      <p id="bdb3f"><cite id="bdb3f"><th id="bdb3f"></th></cite></p><p id="bdb3f"></p>
        <p id="bdb3f"><cite id="bdb3f"></cite></p>

          <pre id="bdb3f"></pre>
          <pre id="bdb3f"><del id="bdb3f"><thead id="bdb3f"></thead></del></pre>

          <ruby id="bdb3f"><mark id="bdb3f"></mark></ruby><ruby id="bdb3f"></ruby>
          <pre id="bdb3f"><pre id="bdb3f"><mark id="bdb3f"></mark></pre></pre><output id="bdb3f"></output><p id="bdb3f"></p><p id="bdb3f"></p>

          <pre id="bdb3f"><del id="bdb3f"><progress id="bdb3f"></progress></del></pre>

                <ruby id="bdb3f"></ruby>

                合規國際互聯網加速 OSASE為企業客戶提供高速穩定SD-WAN國際加速解決方案。 廣告
                # nav-index **版本:CSS3** ### 語法: **nav-index** : auto | <number> | inherit **相關屬性** : [nav-up](#) , [nav-right](#) , [nav-down](#) , [nav-left](#) ### 取值: auto:User Agent默認的順序。<number>:該數字(必須是正整數)指定了元素的導航順序。'1'意味著最先被導航。當若干個元素的nav-index值相同時,則按照文檔的先后順序進行導航。inherit:默認繼承。 ### 說明: 這個屬性是HTML4/XHTML1中屬性'tabindex'的取代品,從HTML4引入并參考了HTML4的建議作了輕微的修改。 該屬性為當前元素指定了其在當前文檔中導航的序列號。導航的序列號指定了頁面中元素通過鍵盤操作獲得焦點的順序。該屬性可以存在于嵌套的頁面元素當中。 為了使user agent能按順序獲取焦點,頁面元素需要遵循如下規則: 1、該元素支持nav-index屬性,而被賦予正整數屬性值的元素將會被優先導航。user agent將按照nav-index屬性值從小到大進行導航。屬性值無須按次序,也無須以特定的值開始。擁有同一nav-index屬性值的元素將以它們在字符流中出現的順序進行導航。 2、對那些不支持nav-index屬性或者nav-index屬性值為auto的元素將以它們在字符流中出現的順序進行導航。 3、對那些禁用的元素,將不參與導航的排序。 用戶實際上使用的開始導航和激活頁面元素的快捷鍵依賴于user agent的設置(如,通常"tab"鍵用于按順序導航,而"enter"鍵則用于激活選中的元素)。 user agent通常也定義了反向順序導航的快捷鍵。當通過"tab"鍵導航到序列的結束(開始)時,user agent可能會循環到導航序列的開始(結束)。按鍵組合"shift-tab"通常用于反向序列導航。 ### 兼容性: <table><thead><tr><th class="type">類型</th> <th class="type_ie"><img src="https://box.kancloud.cn/2015-09-02_55e5d3883a7e9.png" alt="IE" />Internet Explorer</th> <th class="type_firefox"><img src="https://box.kancloud.cn/2015-09-02_55e5d38841ad8.png" alt="Firefox" />Firefox</th> <th class="type_chrome"><img src="https://box.kancloud.cn/2015-09-02_55e5d3884a14b.png" alt="Chrome" />Chrome</th> <th class="type_opera"><img src="https://box.kancloud.cn/2015-09-02_55e5d3885425b.png" alt="Opera" />Opera</th> <th class="type_safari"><img src="https://box.kancloud.cn/2015-09-02_55e5d38864055.png" alt="Safari" />Safari</th> </tr></thead><tbody><tr><td rowspan="4" class="version">版本</td> <td class="support yes"><span>(√)</span>IE6</td> <td class="support no"><span>(×)</span>Firefox 2.0</td> <td class="support yes"><span>(√)</span>Chrome 1.0.x</td> <td class="support yes"><span>(√)</span>Opera 9.63</td> <td class="support yes"><span>(√)</span>Safari 3.1</td> </tr><tr><td class="support yes"><span>(√)</span>IE7</td> <td class="support yes"><span>(√)</span>Firefox 3.0</td> <td class="support yes"><span>(√)</span>Chrome 2.0.x</td> <td></td> <td class="support yes"><span>(√)</span>Safari 4</td> </tr><tr><td class="support yes"><span>(√)</span>IE8</td> <td class="support yes"><span>(√)</span>Firefox 3.5</td> <td></td> <td></td> <td></td> </tr><tr><td></td> <td></td> <td></td> <td></td> <td></td> </tr></tbody></table> ### 示例: <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><title>nav_相關屬性測試</title></head><style>button { position:absolute; }button#b1 { top:0; left:50%; nav-index:1;nav-right:#b2; nav-left:#b4;nav-down:#b2; nav-up:#b4;}button#b2 { top:50%; left:100%; nav-index:2;nav-right:#b3; nav-left:#b1;nav-down:#b3; nav-up:#b1;}button#b3 { top:100%; left:50%; nav-index:3;nav-right:#b4; nav-left:#b2;nav-down:#b4; nav-up:#b2;}button#b4 { top:50%; left:0; nav-index:4;nav-right:#b1; nav-left:#b3;nav-down:#b1; nav-up:#b3;}</style><body> <button id="b1">BT1</button> <button id="b2">BT2</button> <button id="b3">BT3</button> <button id="b4">BT4</button></body></html> 復制代碼 Copyright ? 2009 [Tencent ISD webteam](http://webteam.tencent.com/). All Rights Reserved ### 快速跳轉 - [語法](# "跳轉到“語法”") - [取值](# "跳轉到“取值”") - [說明](# "跳轉到“說明”") - [兼容性](# "跳轉到“兼容性”") - [示例](# "跳轉到“示例”")
                  <ruby id="bdb3f"></ruby>

                  <p id="bdb3f"><cite id="bdb3f"></cite></p>

                    <p id="bdb3f"><cite id="bdb3f"><th id="bdb3f"></th></cite></p><p id="bdb3f"></p>
                      <p id="bdb3f"><cite id="bdb3f"></cite></p>

                        <pre id="bdb3f"></pre>
                        <pre id="bdb3f"><del id="bdb3f"><thead id="bdb3f"></thead></del></pre>

                        <ruby id="bdb3f"><mark id="bdb3f"></mark></ruby><ruby id="bdb3f"></ruby>
                        <pre id="bdb3f"><pre id="bdb3f"><mark id="bdb3f"></mark></pre></pre><output id="bdb3f"></output><p id="bdb3f"></p><p id="bdb3f"></p>

                        <pre id="bdb3f"><del id="bdb3f"><progress id="bdb3f"></progress></del></pre>

                              <ruby id="bdb3f"></ruby>

                              哎呀哎呀视频在线观看