title: How do we clear grid parameters in jqgrid?
body: <p>If I set the jqgrid parameters and then I again want to reset the parameters with new ones, without the old parameters being appended, how do I achieve that?</p>
  
  <p>Lets say,for example:</p>
  
  <pre><code>Step 1: jQuery("#list").setGridParam({url:"testJsp.jsp",
                      mtype: "POST", 
                      postData:{xyz: '23fd', 
                                asd: 'were' }
                      });
  
  Step2: jQuery("#list").setGridParam({url:"testJsp.jsp",
                  mtype: "POST", 
                  postData:{ert: 'trer', 
                            ghj: 'rew' }
  
                  });
  </code></pre>
  
  <p>Now when I do this, by the end of "Step 2" I have a total of 4 parameters, including the parameters from "Step 1". But I don't want this. After "Step 2" I just want to have the parameters of "Step 2".</p>
  
  <p>Is there a way to clear the grid parameters between "Step 1" and "Step 2"?</p>