title: jqGrid search not working
body: <p>I'm new to jqgrid and I don't know how jqgrid work.
  I have an search icon in my grid but it doesn't work when I want to filter some data.
  Below I've post my grid:</p>
  
  <pre><code>jQuery("#list").jqGrid({
                           url:'dounfinish.php',
                           datatype: 'json',
                           mtype: 'POST',
                           colNames:['id','Date', 'Line'],
                           colModel :[ 
                                      {name:'def_id',index:'def_id', hidden:true, width:55}, 
                                      {name:'Problem_date', index:'Problem_date', width:90, editable:true}, 
                                      {name:'Line', index:'Line', width:80, align:'right', editable:true, search:true},
                                      ],
                           pager: jQuery('#pager'),
                           rowNum:10,
                           rowList:[10,20,30],
                           sortname: 'Problem_date',
                           sortorder: "desc",
                           viewrecords: true,
                           imgpath: 'themes/basic/images',
                           caption: 'OQC DEFECT DATA'
                           }); 
  jQuery("#list").jqGrid('navGrid','#pager',{edit:true,add:false,del:false});
  </code></pre>
  
  <p>what should i change to make search process work?</p>