title: Remove null values from javascript array
body: <p>I am having a javascript array.</p>
  
  <pre><code>addresses = new Array(document.client.cli_Build.value, 
      document.client.cli_Address.value, 
      document.client.cli_City.value, 
      document.client.cli_State.value, 
      document.client.cli_Postcode.value, 
      document.client.cli_Country.value);
  document.client.cli_PostalAddress.value = addresses.join(", ");
  </code></pre>
  
  <p>I have to copy the content of all these array value to the postal address textarea. when i use the above join function, comma has been added for null values. How to remove this extra commas?</p>
  
  <p>Thanks</p>