<script>
if ( /Android|webOS|iPhone|iPad|iPod|BlackBerry|IEMobile|Opera Mini/i.test(navigator.userAgent) )
{
document.getElementById("link").onclick = function() { location.href='https://mbasic.facebook.com/' };
}
else
{
document.getElementById("link").onclick = function() { location.href='https://facebook.com/' };
}
</script>