ctrlKey 事件属性

定义和用法

ctrlKey 事件属性可返回一个布尔值,指示当事件发生时,Ctrl 键是否被按下并保持住。

语法

event.ctrlKey=true|false|1|0

实例

下面的例子可提示当鼠标按键被点击时 "CTRL" 键是否被按住:

<html>
<head>
<script type="text/javascript">
function isKeyPressed(event)
{
  if (event.ctrlKey==1)
    {
    alert("The CTRL key was pressed!")
    }
  else
    {
    alert("The CTRL key was NOT pressed!")
    }
  }
</script>
</head>

<body onmousedown="isKeyPressed(event)">
	
	<p>Click somewhere in the document.
An alert box will tell you if you 
pressed the CTRL key or not.</p>

</body>
</html>

TIY

ctrlKey
检测 CTRL 键是否被按下了。