function pollCallback() {

    if (XmlHttp.readyState == 4) {

        if (XmlHttp.status == 200) {

          var message = XmlHttp.responseXml.getElementsByTagName("message")[0].firstChild.data;

          if (message != "done") {

            var new_row = createRow(message);

            var table = document.getElementById("dynamicUpdateArea");

            var table_body = table.getElementsByTagName("tbody").item(0);

            var first_row = table_body.getElementsByTagName("tr").item(1);

            table_body.insertBefore(new_row, first_row);

            setTimeout("pollServer()", 1000);

            refreshTime();

          }

        }
        else {
     
          alert("HTTP error: "+XmlHttp.status);
        }

    }

  }

  function createRow(message) {

    var row = document.createElement("tr");

    var cell = document.createElement("td");

    var cell_data = document.createTextNode(message);

    cell.appendChild(cell_data);

    row.appendChild(cell);

    return row;
   
  }

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