title: jqGrid (Delete row) - How to send additional POST data?
body: <p>I'm having problem with jqGrid delete mechanism as it only send "oper" and "id" parameters in form of POST data (id is the primary key of the table).</p>
  
  <p>The problem is, I need to delete a row based on the id and another column value, let's say user_id. How to add this user_id to the POST data?</p>
  
  <p>I can summarize the issue as the following:</p>
  
  <ol>
  <li>How to get the cell value (user_id) of the selected row?</li>
  <li>AND, how to add that user_id to the POST data so it can be retrieved from the code behind where the actual delete process takes place.</li>
  </ol>
  
  <p>Sample codes:</p>
  
  <pre><code>jQuery("#tags").jqGrid({
                  url: "subgrid.process.php,
                  editurl: "subgrid.process.php?,
                  datatype: "json",
                  mtype: "POST",
                  colNames:['id','user_id','status_type_id'],
                  colModel:[{name:'id', index:'id', width:100, editable:true},
  
                           {name:'user_id', index:'user_id', width:200, editable:true},
  
                          {name:'status_type_id', index:'status_type_id', width:200}
                  ],
                  pager: '#pagernav2',
                  rowNum:10,
                  rowList:[10,20,30,40,50,100],
                  sortname: 'id',
                  sortorder: "asc",
                  caption: "Test",
                  height: 200
          });
          jQuery("#tags").jqGrid('navGrid','#pagernav2',
              {add:true,edit:false,del:true,search:false},
          {},
               {mtype:"POST",closeAfterAdd:true,reloadAfterSubmit:true}, // add options
     {mtype:"POST",reloadAfterSubmit:true}, // del options
              {} // search options
          );
  </code></pre>