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HTML DOM blur() 方法

JavaScript基础 2022-06-08 17:10:55小码哥的IT人生shichen

HTML DOM blur() 方法

定义和用法

focus() 方法用于从下拉列表中移开焦点。

语法

selectObject.blur()

实例

下面的例子可设置或从下拉列表移开焦点:

<html>
<head>
<script type="text/javascript">
function setFocus()
  {
  document.getElementById('select1').focus()
  }
function loseFocus()
  {
  document.getElementById('select1').blur()
  }
</script>
</head>
<body>
<form>
<select id="select1">
  <option>Apple</option>
  <option>Pear</option>
  <option>Banana</option>
  <option>Orange</option>
</select>
<br /><br />
<input type="button" onclick="setFocus()" value="Set focus" />
<input type="button" onclick="loseFocus()" value="Lose focus" />
</form>
</body>
</html>

TIY

完整实例【设置并从下拉列表移开焦点】:

<html>
<head>
<script type="text/javascript">
function setFocus()
  {
  document.getElementById('select1').focus()
  }
function loseFocus()
  {
  document.getElementById('select1').blur()
  }
</script>
</head>
<body>
<form>
<select id="select1">
  <option>Apple</option>
  <option>Pear</option>
  <option>Banana</option>
  <option>Orange</option>
</select>
<br /><br />
<input type="button" onclick="setFocus()" value="Set focus" />
<input type="button" onclick="loseFocus()" value="Lose focus" />
</form>
</body>
</html>

可以使用本站在线JavaScript测试工具测试上述代码运行效果:http://www.phpcodeweb.com/runjs.html

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