Window screenLeftandscreenTopProperty
Window Object
Definition and Usage
The screenLeft and screenTop properties return the X and Y coordinates of the window relative to the screen.
Syntax
window.screenLeft
window.screenTop
window.screenTop
Browser Support
All major browsers support the screenLeft and screenTop properties, except Firefox.
Note:For Firefox, please use "window.screenX" and "window.screenY"。
Example
Example
Return the X and Y coordinates of the new window relative to the screen:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Example Tutorial (example.com)</title>
<script>
function openWin(){
myWindow=window.open('','');
myWindow.document.write("<p>This is 'My Window'");
myWindow.document.write("<br>ScreenLeft: " + myWindow.screenLeft);
myWindow.document.write("<br>ScreenTop: " + myWindow.screenTop + "</p>");
}
</script>
</head>
<body>
<input type="button" value="Open 'My Window'" onclick="openWin()">
</body>
</html>
Try it yourself »
Window Object Other Extensions