var xmlHttp

function showContent(id, url)
{ 
  xmlHttp=GetXmlHttpObject()
  if (xmlHttp==null)
  {
    alert ("Browser does not support HTTP Request")
    return
  }
  xmlHttp.onreadystatechange = function() { 
    if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete")
    { 
      document.getElementById(id).innerHTML=xmlHttp.responseText 
    } 
  }
  xmlHttp.open("GET",url,true)
  xmlHttp.send(null)
}

function GetXmlHttpObject()
{
  var xmlHttp=null;
  try
  {
    // Firefox, Opera 8.0+, Safari
    xmlHttp=new XMLHttpRequest();
  }
  catch (e)
  {
    //Internet Explorer
    try
    {
      xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
    }
    catch (e)
    {
      xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
    }
  }
  return xmlHttp;
}