opener property of window object in javascript

This property is used to return the reference to the main window, which is used to create the window.
  1. <html>
  3. <head>
  4. <script type="text/javascript">
  5. function openmywindow() {
  6. mywin = window.open('', '', 'width=100,height=100');
  7. mywin.document.write("<p>My name is Mahak</p>");
  8. mywin.focus();
  9. mywin.opener.document.write("<p>This is the Main Window</p>");
  10. }
  11. </script>
  12. </head>
  14. <body>
  15. <input type="button" value="Click Me!!!" onclick="openmywindow()" />
  16. </body>
  18. </html>
Output:
1.png