[mamtakansal]

Sure. I had variable number of rows with two fixed columns in the datatable. Here is what I did to remove the elements in the datatable:

   while (tablebody.hasChildNodes()) {   // while tbody has datarow elements
            tablebody.firstChild.firstChild.nodeValue = null;
            tablebody.firstChild.lastChild.nodeValue = null;
            while (tablebody.firstChild.hasChildNodes()) {
                tablebody.firstChild.removeChild(tablebody.firstChild.firstChild);
            }
            tablebody.removeChild(tablebody.firstChild);
        }
        datatable.removeChild(tablebody);

Hope it helps!