Open a new window with a specified left and top position, and return its coordinates:
<!DOCTYPE html> <html> <head> <script> function myFunction() {// w w w. j a v a 2 s . co m var myWindow = window.open("", "myWin", "left=700, top=350, width=200, height=100"); myWindow.document.write("<p>This is 'myWin'"); myWindow.document.write("<br>ScreenX: " + myWindow.screenX); myWindow.document.write("<br>ScreenY: " + myWindow.screenY + "</p>"); } </script> </head> <body> <button onclick="myFunction()">Open "myWin"</button> </body> </html>