// JavaScript Document
<!--
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 validarEmail(valor) {
  if (/^w+([.-]?w+)*@w+([.-]?w+)*(.w{2,3})+$/.test(valor)){
    return (true)
  } else {
    return (false);
  }
}

function checkmail(e){
var emailfilter=/^\w+[\+\.\w-]*@([\w-]+\.)*\w+[\w-]*\.([a-z]{2,4}|\d+)$/i	
var returnval=emailfilter.test(e)
return returnval
}




function registra(){
	
	var contenedor = document.getElementById('eLetter');
	var estado = document.getElementById('estadoLetter');
	var email = document.getElementById('email').value;
	
	if(checkmail(email)){	
		ajax=nuevoAjax();
		ajax.open("POST", "ajax-letter.php",true);
	
		estado.innerHTML = "Agregando email ...";
		
		ajax.onreadystatechange=function() {
			if (ajax.readyState==4) {	
		
				contenedor.innerHTML = ajax.responseText
				estado.innerHTML = "";	
			
	 		}
		}
		ajax.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");	
		ajax.send("email="+email);
	}else{
		estado.innerHTML = "Ingrese su e-mail de forma correcta.";	
	}
	
}