html5中常用互動元素實現的代碼執行個體

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 <!doctype html><html><head><meta charset="utf-8"><title>二、HTML5中常用的互動元素</title><script type="text/javascript">function command_click(){document.getElementById("show").innerHTML="點擊了開啟command·";}    var intVal = 0;var intTimer;var objpro = document.getElementById('objpro');var title = document.getElementById('mytitle');function interval_handler(){intVal++;objpro.value = intVal;if(intVal >= objpro.max){clearInterval(intTimer);title.innerHTML = "下載完成";}else{title.innerHTML = "正在下載"+intVal+"%";}}function btn_click(){intTimer = setInterval(interval_handler,100);}  </script>------------------------------------------------------------------<menu><command onclick="command_click();">開啟</command>  </menu>  <p id="show"></p></head><body><form>      <input id="myCar" list="cars" >    <datalist id="cars">  <option value="BMW">  <option value="Ford">  <option value="Volvo">    </datalist>      </input>      <hr><hr>            <span>顯示內容</span>      <details id="detail" open="open">       我被顯示出來了      </details>      <hr><hr>            <details>    <summary>HTML 5</summary>      歡迎使用 summary 標籤  </details>      <hr><hr>      </form>         <menu>        <li>            <img src="Chrome.png">            <span>Chrome瀏覽器</span>        </li>        <li>            <img src="360.png">            <span>360瀏覽器</span>        </li>        <li>            <img src="IE.png">            <span>IE瀏覽器</span>        </li>      </menu>      <hr><hr>            <menu>    <command onclick="alert('command click');">    Click Me!    </command>      </menu>      <hr><hr>  <p id="mytitle">開始下載</p>    <progress value="0" max="100" id="objpro">      </progress>      <input type="button" value="下載" onclick="btn_click();">      <hr><hr>            <p>120人蔘與投票,明細如下:</p>      <p>張三:      <meter value="0.3" optimum="1" high="0.9" low="1" max="1" min="0"></meter>      <span>30%</span>      </p>      <p>李四:      <meter value="70" optimum="100" high="90" low="10" max="100" min="0"></meter>      <span>70%</span>      </p>  <hr><hr>                  </body></html>
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