title: How to get client MAC address by a access on a website?
body: <p>I have my website, and it records the number of visitors, IP and time of access...</p>
  
  <p>I want to identify each visitor... I think that this was possible recording IP Address... but when the IP is dynamic, my system fails. So I think that I can solve it recording MAC address... is possible? What language should use? PHP, ASP, Javascript?</p>
  
  <p>Thanks</p>
  
  <p>Edit: What I can use to identify each user without having login information (username &amp; pwd).</p>