function notify() {
  createRequest();
}

function createRequest() {
	if (window.XMLHttpRequest)
	  {// code for IE7+, Firefox, Chrome, Opera, Safari
	  xmlhttp=new XMLHttpRequest();
	  }
	else
	  {// code for IE6, IE5
	  xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
	  }
	sendRequest(xmlhttp);
}

function sendRequest(xmlhttp) {
  var email = document.getElementById("email").value;

	xmlhttp.onreadystatechange=function()
  {
	  if (xmlhttp.readyState==4 && xmlhttp.status==200)
	    {
	    document.getElementById("notify").innerHTML=xmlhttp.responseText;
	    }
	  else if(xmlhttp.readyState!=4) {
	    document.getElementById("notify").innerHTML="<img class=\"loading\" src=\"loading.gif\" alt=\"Loading\" />";
	  }
	}
	
	xmlhttp.open("POST","notify.php",true);
	xmlhttp.setRequestHeader("Content-type","application/x-www-form-urlencoded");
  xmlhttp.send("email=" + email);
}

function toggleInputValue() {
  var text = document.forms[0].elements[0];
  var defaultText = "Join our mailing list!";
  
  if( text.value == defaultText ) {
    text.value = "";
  } else if( text.value == "" ) {
    text.value = defaultText;
  } 
}