How to resize popup after popup submit button click

How to resize popup after popup submit button click

Hello,

I have a html that is creating a popup.

The popup has a submit button to a another website.

I would like to resize the popup after the popup submit has been clicked.

I have assigned an ID to the popup submit button but the main screen doesnt see it and doesnt resize the popup.

Any suggestions.

  1.  var w;                                                 
  2.                                                         
  3.  $(document).ready(function() {                         
  4.                                                         
  5.     $("#winpopup").click(function () {                  
  6.       w.resizeTo(900,900);                              
  7.     });