jqGrid, access to "filters" parametr
<p>How can i access (set or modify) "filters" parameter in jqGrid without dialog window?</p>

<p>For example, when i try find by entry by name i have:</p>

<pre><code>{"groupOp":"AND","rules":[{"field":"jgrd_name","op":"cn","data":"SAMPLE"}]}
</code></pre>

<p>Grid:</p>

<pre class="lang-js prettyprint-override"><code>$("#mainTable").jqGrid(
{ 
    url:'index.php',
    datatype: 'xml',
    mtype: 'GET',
    autoencode: true,
    autowidth: true,
    caption: 'db one',
    prmNames: { page: "jgpage", rows:"jgrows", sort:"jgsidx", order:"jgsord", search:"jg_search", nd:"jgnd", id:"jgid", oper:"jgoper", editoper:"jgedit", addoper:"jgadd", deloper:"jgdel", totalrows:"jgtotalrows", subgridid:"jgsubid" },
    hidegrid: false,
    colNames:[ "key", "name", "category" ],
    colModel :[ 
        { name:'jgrd_id' , index:'jgrd_id' , sortable:true, align:'center', width:'35', editable:false },
        { name:'jgrd_name' , index:'jgrd_name' , sortable:true, align:'center', editable:false },
        { name:'jgrd_catname' , index:'jgrd_catname' , sortable:true, align:'center', editable:false },
    ],
    pager: '#mainTablePager',
    rowNum: 20,
    rowList:[15,20,50,100,150],
    viewrecords: true,
    gridview: true,
    height: '100%',
    multiselect: true,
    toolbar: [true,"top"]
}).navGrid('#mainTablePager',
      { edit:false,add:false,del:false },
      {},
      {},
      {},
      {closeOnEscape:true, multipleSearch:true, closeAfterSearch:true}, // search options
      {}
);
</code></pre>
