How to reinitialize jquery Datatable

How to reinitialize a jQuery datatable? I even tried to remove table element. Still that table is displaying. My code is like this:

function removeExistingDataTableReference(tableid)
{
    if(oTable !=null)
    {
        oTable.fnDestroy();
    }

    if(document.getElementById(tableid)){
      document.getElementById(tableid).innerHTML="";
    }

    oTable=null;

    try
    {
        if(oTable !=null)
        {
            //oTable.fnDestroy();
            alert("error in fndestroy");
        }

        oTable=null;

        if(document.getElementById(tableid)){
            document.getElementById(tableid).innerHTML="";
        }

        if(document.getElementById("FTable"))
        {
            removeElement(document.getElementById("FTable"));   
        }

    }
    catch(e)
    {
        alert("Error happend:"+e.message);
    }

}

function removeElement(element) 
{   
  try
  {
       var elem = document.getElementById('FTable');
       elem.parentNode.removeChild(elem);
       //ert(element.parentNode.id);
       //element.parentNode.removeChild(element);
       alert("removed");
       return true;
   }
   catch(e)
   {
      alert(e.message);
   }

   return false;

}

How can I do that? After Search button click table is loaded. Again, when I search with another search parameter, table should load with new data. That is not happening. How to fix it??

Table is initialized like this:

function createDataTable()
{
    try
    {
         oTable = $('#FTable').dataTable( {
             "bDestroy":true,
             "bJQueryUI": true,
            "sScrollX": "100%",
            "sScrollXInner": tablewidth+"px",
            "bScrollCollapse": true,
            "bSort":false,
            "iDisplayLength" : 50,
            "sPaginationType" : "full_numbers",
            "aLengthMenu": [[10, 18, 50, -1], [10, 18, 50, "All"]]
        } );

        new FixedColumns( oTable, {
            "iLeftColumn