title: redirect a mobile site only once
body: <p>Hy i just want to know the code to paste to the "index.html" of my website so i Can ask Mobiles users if they want to be redirected to mobile version or go to desktop version
  but i haven't figured out a way
  Cause the code i found always redirect with no chance to go to desktop version on mobile</p>
  
  <p>I am not able to post the code that i found but the question says it all</p>
  
  <p>If this is not possible i just want to know a code that redirect mobile users only "ONCE" please and thank you</p>
  
  <p>i have no professional experience in this...just a beginner</p>