Javascript Reference - Window screenLeft and screenTop Property

The screenLeft and screenTop properties returns the x and y coordinates of the window relative to the screen.

Browser Support

For Firefox, use "window.screenX" and "window.screenY".


`screenLeft and screenTop`	Yes	Yes	No	Yes	Yes

Syntax

window.screenLeft
window.screenTop

Return Value

The horizontal and vertical distance of the window relative to the screen.

Example

The following code shows how to get the x and y coordinates of the new window relative to the screen.


<!DOCTYPE html>
<html>
<head>
<script>
function myFunction() {<!--from   w  w w. j  a  v  a2s.c o  m-->
    var myWindow = window.open("", "myWin");
    myWindow.document.write("<p>This is 'myWin'");
    myWindow.document.write("<br>ScreenLeft: " + myWindow.screenLeft);
    myWindow.document.write("<br>ScreenTop: " + myWindow.screenTop + "</p>");
}
</script>
</head>
<body>

<button onclick="myFunction()">Open "myWin"</button>

</body>
</html>

The code above is rendered as follows: