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    <p>One can see at least two important problem in the code of <code>abc</code> function.</p> <p>The first one is the usage of <code>setGridParam</code> <em>before</em> <code>JQuery("#table2").jqGrid({...});</code> which <em>creates</em> the grid. You can't use <code>setGridParam</code> on the <code>&lt;table&gt;</code>. The call like <code>JQuery("#table2").jqGrid({...});</code> converts empty <code>&lt;table id="table2"&gt;&lt;/table&gt;</code> element in relatively complex structure of dives and tables which will be used to display the grid. So you should <em>first create the grid</em> (covert empty <code>&lt;table&gt;</code> to the grid) and only after it you can use <code>setGridParam</code> or <code>.trigger("reloadGrid")</code> to refresh grid content.</p> <p>The second problem is the usage of <code>JQuery("#table2").jqGrid({...});</code> inside of function <code>abc</code> which you call <em>multiple times</em>. As I described before the call <code>JQuery("#table2").jqGrid({...});</code> coverts empty <code>&lt;table&gt;</code> to the grid. So one can make such call <em>only once</em>. For the second loading of the grid you should just use <code>setGridParam</code> and <code>.trigger("reloadGrid")</code> to refresh grid content.</p> <p><strong>UPDATED</strong>: If you want implement master/details scenario you can do following:</p> <pre><code>// create master grid $("#table1").jqGrid({ datatype: "json", url: "masterGridUrl", onSelectRow: function (rowid, state) { if (state) { // if not the same row was previously selected // refresh detail grid $("#table2").jqGrid("setGridParam", { datatype: "json"}) .trigger("reloadGrid", [{page: 1}]); } }, ... // another options }); // create details grid without filling the data initially $("#table2").jqGrid({ datatype: "json", // we use "local" instead of "json" to have to request to the server url: "JGridA", postData: { action: "abc", hidden: function () { // id of currently selected row return $("#table1").jqGrid("getGridParam", "selrow"); } }, ... // other options }); </code></pre> <p>It will create master grid "#table1" and empty detail grid "#table2". After selection of row in the master grid the body of detail grid will be reloaded. Detail grid send to the server two additional parameters: one static parameter <code>action=abc</code> and another parameter <code>hidden</code> which value is the rowid of the master grid.</p> <p>If you use <code>navGrid</code> in the master grid you can add <code>beforeRefresh</code> callback (see <a href="https://stackoverflow.com/a/3772720/315935">the answer</a> for the code example). In the <code>beforeRefresh</code> callback of master grid you can call <code>clearGridData</code> for the detail grid. So if you would refresh the master grid the detail grid will be empty till the row in the master grid will be selected.</p>
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    1. COok...thank you for the response....I will use setGridParam inside the grid. But how do I check for the second loading of the grid.
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    2. CO@vani: You are welcome! I don't understand what you want to do at the *second* loading. If you need cont the number of loads you can just use variable defined in outer scope. You can increment it inside of `loadComplete` callback.
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    3. COActually based on the value selected in the first grid, i have to populate the second grid. So in the url of Second grid, i am passing the id of the first grid. The second grid is populated for the first time. But second time, when a record is selected in the first grid, the second grid gets refreshed only when I click on the "reload grid". So once a record is selected in the first grid, I want to programatically load the second grid with the current value selected in the first grid.
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