var siteurl = document.frmsiteurl.siteurl.value;

function getHTTPObject()
{
	// code for Mozilla, etc.
	if (window.XMLHttpRequest)
  	{
  		xmlhttp=new XMLHttpRequest()
  	}
// code for IE
	else if (window.ActiveXObject)
  	{
  		xmlhttp=new ActiveXObject("Microsoft.XMLHTTP")
  	}
	return xmlhttp;
}
var http = getHTTPObject();

function sigup_newsletter(email)
{
	if(document.frmnewsletter.newsletter_email.value == "Enter your Email Address here")
	{
		alert("Please enter email address");
		document.frmnewsletter.newsletter_email.focus();
		return false;
	}

	if(document.frmnewsletter.newsletter_email.value == "")
	{
		alert("Please enter email address");
		document.frmnewsletter.newsletter_email.focus();
		return false;
	}
	if(!isValidEmail(document.frmnewsletter.newsletter_email.value))
	{
		document.frmnewsletter.newsletter_email.focus();
		return false;
	}
	email = document.frmnewsletter.newsletter_email.value;
	//get url of ajax file

	var url = siteurl+"ajax_newsletter_signup.php";
	url = url + "?email="+ escape(email);
	http.open("GET", url, true);
	http.onreadystatechange = addnewsletteremail;
    http.send(null);
}

function addnewsletteremail()
{
	if (http.readyState == 4)
	{
   		var xmlDocument = http.responseXML; 
		var newsletterid  = xmlDocument.getElementsByTagName('id').item(0).firstChild.data;
		if(newsletterid == 0)
		{
			document.getElementById('show_news_failure').style.display = '';
			document.getElementById('show_news_success').style.display = 'none';
		}
		else
		{
			document.getElementById('show_news_success').style.display = '';
			document.getElementById('show_news_failure').style.display = 'none';
		}
	}
}