function nuevoAjax(){
var xmlhttp=false;
 try {
  xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
 } catch (e) {
  try {
   xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
  } catch (E) {
   xmlhttp = false;
  }
 }

if (!xmlhttp && typeof XMLHttpRequest!='undefined') {
  xmlhttp = new XMLHttpRequest();
}
return xmlhttp;
}

function altaNewsletter()
{
    c = document.getElementById('resultado_mensaje');
	f = document.getElementById('DIVnewsletterform');
	
	//variable=documenet.nombre_del_form.nombre_del_control.value
	email=document.newsletterform.email.value;
	//dest=document.mailform.email_destino.value;
	//men=document.mailform.mensaje.value;
    //alert(emis);
	
	ajax=nuevoAjax();
    f.style.display = "none";
    //f.innerHTML = "hola";
	c.innerHTML = '<p style="text-align:center;"><img src="../images/esperando.gif"/></p>';
    c.style.display = "block"; 
	ajax.open("POST", "../newsletter_exec.php",true);
	ajax.onreadystatechange=function() {
		if (ajax.readyState==4) {
			c.innerHTML = ajax.responseText
		}
		borrarCampos()
	}
	ajax.setRequestHeader("Content-Type","application/x-www-form-urlencoded");
	ajax.send("email="+email)
}

function borrarCampos(){
	//document.newsletterform.emisor.value="";
	document.newsletterform.email.value="";
	//document.newsletterform.mensaje.value="";
	//document.newsletterform.email_destino.focus();
}