Something

var xmlHttp

function bots(name,prtr,putr,inv,chan)
{ 
xmlHttp=GetXmlHttpObject();
if (xmlHttp==null)
  {
  alert ("Your browser does not support AJAX!");
  return;
  }  
var url="botlist.php";
url=url+"?name="+name+"&pr="+prtr+"&pu="+putr+"&inv="+inv+"&chan="+chan;
url=url+"&sid="+Math.random();
xmlHttp.onreadystatechange=stateChanged;
document.getElementById("botList").innerHTML="<br><br><br><center><img src=\"img/ajax-loader.gif\"></center>";
xmlHttp.open("GET",url,true);
xmlHttp.send(null);
}

function stateChanged() 
{ 
if (xmlHttp.readyState==4)
{ 
document.getElementById("botList").innerHTML=xmlHttp.responseText;
}
}

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;
}