title: populate jqgrid with json data from a PHP file
body: <p>I am absolutely new to trirand's jqGrid. I have a fundamental question. I have a form which calls a php file and the latter echoes a JSON response after a submit button. I can format the JSON data in the form needed by jqGrid as mentioned in the manual. But how  do I populate it without using another button. I have tried:</p>
  
  <pre><code>     $("#output_grid").jqGrid({ //grid5 function starts
       url: "searchresults.php",
       datatype: "json",
       mtype: "GET",
       ................
       ................
  </code></pre>
  
  <p>what I mean is How do I trigger the grid  to read the data sent by php file?</p>