title: Javascript to detect iPhone web browser
body: <p>I am looking for a way to detect if a page is visited by an iPhone.</p>
  
  <p>What I'm basically looking for is for a way to stop all but iPhone from viewing a specific web page.</p>
  
  <p>Something like... </p>
  
  <p>If Browser !=iPhone then exit;</p>
  
  <p>Is this possible using Javascript?</p>