title: datatables global search on keypress of enter key instead of any key keypress
body: <p>I am using <a href="http://datatables.net">Datatables</a> plugin of jQuery.
  I am using server side processing functionality for my ASP.Net project.</p>
  
  <p>Its get frustrating when each time I try to type something in global search, with each letter I type it calls the server side method and brings result for me.</p>
  
  <p>It gets more frustrating when the data to be filter is large.  </p>
  
  <p>Is there any option or way to call search method on keypress of enter key and not on any key press?</p>