title: update session variable without page refresh
body: <p>I need to update the session variable on page 1, when click on a link in iframe (external page).
  session variable is successfully set when i click on iframe's link.
  the problem is i need to refresh the page 1 to update that session variable on page1.</p>
  
  <p><img src="https://i.stack.imgur.com/BUeoJ.jpg" alt="enter image description here"></p>
  
  <p>how to resolve this.any ajax , jquery help.
  THanks</p>