Script for button "View Desktop Version"?

Question

I want to make a link in footer of my mobile site version, pointing to desktop version of the site. But I have this script in desktop version:

<script type="text/javascript">
  <!--
  if (screen.width < 800) {
    window.location = "mysite.com/m/page1.html";
  }
  //-->
</script>

If a make this link in mobile version:

<a href="mysite.com/page1.html">View desktop version</a>

the hypelink pointed to desktop site but desktop is redirecting back to mobile version and this is unended cycle of redirection.

How to make this: - i have script in desktop version for redirect to mobile site and - if the mobile user want to view desktop version, clicking at the link "view desktop version" to go at desktop version without redirect back in mobile version?

Thanks