function xmlhttpPost(strURL) {
    var xmlHttpReq = false;
    var self = this;
    // Mozilla/Safari
    if (window.XMLHttpRequest) {
        self.xmlHttpReq = new XMLHttpRequest();
    }
    // IE
    else if (window.ActiveXObject) {
        self.xmlHttpReq = new ActiveXObject("Microsoft.XMLHTTP");
    }
	self.xmlHttpReq.open('POST', strURL, true);
    self.xmlHttpReq.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
	self.xmlHttpReq.onreadystatechange = function() {
		if (self.xmlHttpReq.readyState == 4) {
            updatepage(self.xmlHttpReq.responseText);
        }
    }
    self.xmlHttpReq.send(getquerystring());
}

function getquerystring() {
	var email = document.getElementById('email').value;	
    qstr = 'contents='+ escape(email)+'|true';
    return qstr;
}

function updatepage(str){
    document.getElementById("adicionando_email").innerHTML = str;
}

function adiciona_newsletter()
{
    document.getElementById("adicionando_email").innerHTML = 'Processando...';
	document.getElementById('adicionando_email').style.display = 'block';
	xmlhttpPost("./newsletter/");
}