title: postData not working in JqGrid
body: <p>I am trying to add a new row to the JqGrid Table, the json sent in the request is received by the server. Now I am trying to add new parameter to the json using the</p>
  
  <pre><code>postData : {my_parameter: "my_id"}
  </code></pre>
  
  <p>but still <code>my_parameter</code> is not sent.</p>
  
  <p>I have also tried keeping the <code>mtype : "GET"</code> , still its not sending my custom parameter in the json.
  Please could you help me. </p>
  
  <p>Thanks in advance.</p>
  
  <pre><code>   jQuery(grid_selector).jqGrid({
      data: griddata,
      datatype: "local",
      height: "auto",
      colNames:[' ', 'ID','Activity Name', 'Phase'],
      colModel:[
          {name:'myac',index:'', width:80, fixed:true, sortable:false, resize:false,
              formatter:'actions',
              formatoptions:{
                  keys:true,
                  //delbutton: false,//disable delete button
  
                  delOptions:{recreateForm: true, beforeShowForm:beforeDeleteCallback},
                  //editformbutton:true, editOptions:{recreateForm: true, beforeShowForm:beforeEditCallback}
              }
          },
          {name:'id',index:'id', width:60, sorttype:"int", editable: true},
          {name:'name',index:'name', width:150,editable: true,edittype:"select",editoptions:{value:activity_val}},
          {name:'phase',index:'phase', width:90, editable: true,edittype:"select",editoptions:{value:"Phase1:Phase I;Phase2:Phase II;Other:Other"}},
      ],
  
      viewrecords : true,
      rowNum:20,
      rowList:[10,20,30],
      pager : pager_selector,
      altRows: true,
      gridview: true,
      //toppager: true,
  
      multiselect: false,
      //multikey: "ctrlKey",
      multiboxonly: true,
  
      loadComplete : function() {
          var table = this;
          setTimeout(function(){
              styleCheckbox(table);
  
              updateActionIcons(table);
              updatePagerIcons(table);
              enableTooltips(table);
          }, 0);
      },
      editurl: '/del_row/',//nothing is saved
      cellEdit: true,
      postData: {MyId :function() { return $('#MyId').val();}},
      caption: "Activty Phase Mapping"
  });
  </code></pre>