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;
}

function inviteUser(email){
   
xmlHttp=GetXmlHttpObject()
if (xmlHttp==null)
  {
  alert ("Your browser does not support AJAX!");
  return;
  }

var url="inviteuser.php";
url=url+"?email="+email;
url=url+"&arbit="+Math.random();
xmlHttp.onreadystatechange=stateChanged_invite;
xmlHttp.open("GET",url,true);
xmlHttp.send(null);
  
}

function stateChanged_invite() 
{
if (xmlHttp.readyState==3)
{ 
document.getElementById("invite").innerHTML=" ";
}
	
	
if (xmlHttp.readyState==4)
{ 
if(xmlHttp.responseText=='login'){
	
window.location="index.php";
}
document.getElementById("invite").innerHTML=xmlHttp.responseText;
}

}