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Javascript Form - 如何将焦点提供给选择框...

select 【select】
我们想知道如何将焦点提供给选择框。...
代码展示 运行结果 

 
<html>
<head>
    <script language="JavaScript">
    function removeFocus(){
      document.myForm.mySelect.blur();
    }
    </script>
    </head>
<body>
    <form name="myForm">
      <select name="mySelect" multiple>
        <option value=A>AA</option>
        <option value=B>BB</option>
        <option value=C>CC</option>
        <option value=D>DD</option>
      </select>
      <input type=BUTTON value="Click to Remove Focus" name="myButton"
            onClick="removeFocus()">
    </form>
</body>
</html>