var xmlHttp;

function clearValue(ele){

 if(ele.value == 'Your email address'){
   ele.value = '';
 }

}

function subscribe(emailAd,which){

  if(emailAd.length==0){
    alert("You must enter in your email address");
    return;
  }

  xmlHttp=GetXmlHttpObject();

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

  var url;
  if(which=='un'){
    url="/js/maillist/remove.php";
  }else{
    url="/js/maillist/add.php";
  }
  url=url+"?q="+emailAd;
  url=url+"&sid="+Math.random();
  xmlHttp.onreadystatechange=stateChanged;
  xmlHttp.open("GET",url,true);
  xmlHttp.send(null);

}

function stateChanged(){

  if(xmlHttp.readyState==4){
    alert(xmlHttp.responseText);
    document.forms.mailinglist.email.value='';
    document.forms.mailinglist.email.focus();
  }
  
}

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;
  
}