title: retrieving row value when multiple rows share same id
body: <pre><code>var rowId = $(this).closest("tr.jqgrow").attr("id");
  
  var writer = jQuery('#reportList').jqGrid('getCell', rowId, 'writer');
  </code></pre>
  
  <p>I set 'key:true' to 'num' column inside 'colModel'
  and the values of 'num' are from mySql  </p>
  
  <p>I'm trying to retrieve writer with the code above when clicking a row  </p>
  
  <p>However,  because some of rows share same id, the wrong information is stored in 'writer'.</p>
  
  <p>In this case, is there any way to distinguish the row and get correct value even if some rows share same id???</p>