title: jQuery : check if websites online status using AJAX
body: <p>i have a database of website addresses, and need some kind of "loop" to check this websites online status using jQuery AJAX.</p>
  
  <p>before</p>
  
  <pre><code>URLs                        | status
  ----------------------------|--------
  http://www.google.com       |
  http://www.yahoo.com        |
  http://www.lycos.com        |
  http://www.blablabla.com    |
  
  [btn_CheckOnlineStatus]
  </code></pre>
  
  <p>after i push <code>[btn_CheckOnlineStatus]</code></p>
  
  <pre><code>URLs                        | status
  ----------------------------|--------
  http://www.google.com       | online
  http://www.yahoo.com        | offline
  http://www.lycos.com        | online
  http://www.blablabla.com    | online
  
  [btn_CheckOnlineStatus]
  </code></pre>