title: open popup in alreadily open pop up window
body: <p>My jsp application has one home page and that has so many anchors <code>&lt;a&gt;</code> for accessing different pages using AJAX.
  one anchor is for creating user which opens a particular user registration window using javascript <code>window.open</code> of size <code>1050*600</code>.</p>
  
  <p>at end of use r registration i am providing two anchors :
  1. for displaying preview of registered info and 
  2. for taking print out of registered info.</p>
  
  <p>both are of size <code>500*200</code> and again I am calling javscript <code>window.open()</code> to open these two windows.
  but it's not they are taking same size as that of parent pop up (ie.1050*600).</p>
  
  <p>how to open pop-up in alreadily open pop-up window? </p>