Home > Javascript > Javascript: Close Main Window

Javascript: Close Main Window

When we call window.close(), it closes the popup windows, that are opened up using the window.open(…) method, without any issue. But when we try to call the method window.open on a main window, that was not opened up using the window.open(…) method, window is not closed  by default and a confirm box is shown first.

In the method window.close(…) javascript simply checks if the window.opener is Null or not, if it is Null a confirm box is shown. So the trick is to set some value in the window.opener variable, this way javascript will treat this window as a popup window and the window.close will work without any message. You can try the following code yourself to experience this:

 /*This function closes the passed (or the current) window without showing the confirm box even if the window is not opened using the window.open method */

function
closeMainWindow(win)
{
          if (!win) //If no windows is passed – close the current window
          {
                    win = window;
          }

          win.opener=‘X’;
          //This will not show the confirm dialog before closing the window.
          //Javascript will treat this window as a Popup.  

          win.open(”, ‘_parent’, ); 
          //Only for IE-7, this line is not needed for IE6
          win.close(); 
          //Now the call to window.close() will not display any warning/confirm dialog on IE6 and IE7
}

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