var client_test;

if (document.getElementById)
{ client_test = "a"; }
else if (document.all)
{ client_test = "b"; }
else if (document.layers)
{ client_test = "c"; }
function get_id(strname)
{
  switch (client_test)
  {
    case "a":
      return document.getElementById(strname);
      break;
    case "b":
      return document.layers[strname];
      break;
    default :
      return document.all(strname);
      break;
  }
}
var xmlhttp = function()
{
  var xmlObj = null;
  if(window.XMLHttpRequest){
      xmlObj = new XMLHttpRequest();
  } else if(window.ActiveXObject){
      xmlObj = new ActiveXObject("Microsoft.XMLHTTP");
  } else {
      return;
  }
  return xmlObj;
}
function igets(strers, callback)
{
  var nxmlhttp = new xmlhttp();
  nxmlhttp.onreadystatechange = function()
  {
    if (nxmlhttp.readyState == 4)
    {
      if (nxmlhttp.status == 200 || nxmlhttp.status == 304)
      {
        callback(nxmlhttp.responseText);
      }
      else
      {
        callback("$error$")
      }
    }
  }
  nxmlhttp.open("get", strers, true);
  nxmlhttp.send(null);
}