function get_element(id)
{
    var browser=navigator.appName;   
    if (browser == "Netscape")
    return document.getElementById(id);
    else if (browser == "Microsoft Internet Explorer")
    return document.all(id);
    else
    return document.getElementById(id);
        
}

function show(id)
{
    if (get_element(id).style.display=="none")
        get_element(id).style.display="inline"; 
    else if (get_element(id).style.display=="inline")
        get_element(id).style.display="none";                         
}

var xmlhttp;

function ajax(url, div_id)
{     
xmlhttp=GetXmlHttpObject();
if (xmlhttp==null)
  {
  alert ("Browser does not support HTTP Request");
  return;
  }
  
xmlhttp.onreadystatechange=stateChanged;
xmlhttp.open("GET",url,true); 
divID = div_id;
xmlhttp.send(null);
}

function stateChanged()
{
    if (xmlhttp.readyState==4)
    {
    get_element(divID).innerHTML=xmlhttp.responseText;
    }
    
}

function GetXmlHttpObject()
{
if (window.XMLHttpRequest)
  {
  // code for IE7+, Firefox, Chrome, Opera, Safari
  return new XMLHttpRequest();
  }
if (window.ActiveXObject)
  {
  // code for IE6, IE5
  return new ActiveXObject("Microsoft.XMLHTTP");
  }
return null;
}