How to get height and width after window resize

I have a scorm module which launches in a new window with resizable = 1 in window.open in my js file:

function OpenScormModuleWindow(scormModuleId, scormModuleUrl, title, width, height) 
{
  _scormModuleId = scormModuleId;
  InitializeUserScormModule();
  scormModuleWindow = window.open(scormModuleUrl, "title", "width=" + width + ", height=" + height + ", resizable = 1");
  scormModuleWindow.focus();
}

in my view I have:

  var myWidth = 0, myHeight = 0;
  if (typeof (window.innerWidth) == 'number')
  {
      myWidth = window.innerWidth;
      myHeight = window.innerHeight;
  }
  else if (document.documentElement && (document.documentElement.clientWidth || document.documentElement.clientHeight))
  {
      myWidth = document.documentElement.clientWidth; myHeight = document.documentElement.clientHeight;
  }
  else if (document.body && (document.body.clientWidth || document.body.clientHeight))
  {
      myWidth = document.body.clientWidth; myHeight = document.body.clientHeight;
  }

I get height and width but is not correct

the user can now resize, when the window is the correct size, how can I get the height and width please?

I need to get these values so I can save it, next time the window opens it is the correct size.

thanks