var xmlhttp;
var umpires;
var teas;
var paid;
var form;

function calcTotal(paid)
{
xmlhttp=GetXmlHttpObject();
if (xmlhttp==null)
  {
  
  alert ("Browser does not support HTTP Request");
  return;
  }
 
umpires = document.getElementById("umpires").value;
teas = document.getElementById("teas").value;
 
var url="calculatetotal.php";
url=url+"?paid="+paid;
url=url+"&umpires="+umpires;
url=url+"&teas="+teas;
url=url+"&sid="+Math.random();
xmlhttp.onreadystatechange=totalChanged;
xmlhttp.open("GET",url,true);
xmlhttp.send(null);
}

function totalChanged()
{
  if (xmlhttp.readyState==4)
  {
    document.getElementById("transfer").value=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;
}