var xmlhttp;

function showUser()
{
xmlhttp=GetXmlHttpObject();
if (xmlhttp==null)
  {
  alert ("Browser does not support HTTP Request");
  return;
  }

var name =  document.ajaxradioform.name.value; //gets name
var email = document.ajaxradioform.email.value; //gets email 

for (var i=0; i < document.ajaxradioform.myradio.length; i++){
   if (document.ajaxradioform.myradio[i].checked){
     var radiovalue = document.ajaxradioform.myradio[i].value; //gets radiovalue (either 'subscribe' or 'unsubscribe')
   }
}


var emailExp = /^[\w\-\.\+]+\@[a-zA-Z0-9\.\-]+\.[a-zA-z0-9]{2,4}$/;

//if ((!email) || (!email.match(emailExp))){
if ((!email) || (!email.match(emailExp)) || (!name)){

	//	alert("Please enter a valid email!");
	document.getElementById('mailerror').style.visibility = 'visible'; 
	return false;
}
//else if (!name){
//	document.getElementById('mailerror').style.visibility = 'visible'; 
//	return false;
//}
	

else
	{
	document.getElementById('mailerror').style.visibility = 'hidden'; //hide the error message
	document.getElementById('button').disabled=true; //disable the button
	var t=setTimeout("document.getElementById('button').disabled=false", 5000);// re-enable the button after 5 seconds
	var url="getuser.php";
	//url=url+"?q="+str;
	//url=url+"?radiovalue=" +radiovalue +str;
	//url=url+"?radiovalue=" +radiovalue +email;//no radio value is both
	//url=url+"?radiovalue=" +radiovalue +"?email=" +email;//no radio value is both
	//url=url+"?radiovalue=" +radiovalue;//no these 2 together -radio val is both
	//url=url+"?email=" +email;

	//url=url + "?radiovalue=" + radiovalue +"&email=" +email ;
	url=url + "?radiovalue=" +radiovalue +"&name=" +name +"&email=" +email ;

	//url=url+"?radiovalue=" +"?email=";//this works??
	//url=url + radiovalue + email; //no
	url=url+"&sid="+Math.random();
	xmlhttp.onreadystatechange=stateChanged;
	xmlhttp.open("GET",url,true);
	xmlhttp.send(null);
	}
}

function stateChanged()
{
if (xmlhttp.readyState==4)
{
document.getElementById("txtHint").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;
}