screenYEvent Property

事件对象参考手册Event Object

Definition and Usage

The screenY event property can return the vertical coordinate of the mouse pointer relative to the screen when an event occurs.

Syntax

event.screenY


Example

Example

The following example shows the coordinates of the mouse pointer when an event occurs:

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Rookie Tutorial (example.com)</title>
<script type="text/javascript">
function coordinates(event){
    x=event.screenX
    y=event.screenY
    alert("X=" + x + " Y=" + y)
}
</script>
</head>
<body onmousedown="coordinates(event)">

<p>
Click a location in the document. A message box will display the x and y coordinates of the pointer relative to the screen.
</p>

</body>
</html>

Try it Yourself »


事件对象参考手册Event Object Other Extensions