title: How to trigger a phone call when clicking a link in a web page on mobile phone
body: <p>I need to build a web page for mobile devices. There's only one thing I still haven't figured out: how can I trigger a phone call through the click of text?</p>
  
  <p>Is there a special URL I could enter like the <code>mailto:</code> tag for emails?</p>
  
  <p>Device specific solution are not preferred.</p>
  
  <p>I know iPhone automatically recognizes phone numbers and creates a link for this, but it would be great if this could be done for images too... and also for most mobile devices.</p>