function validEmail(email) {
  var strReg = "^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$";
  var regex = new RegExp(strReg);
  return(regex.test(email));
}

function subscribeNewsletter() {
	
	var vorname = $("#nl_vorname").attr("value");
	var nachname = $("#nl_nachname").attr("value");
	var email = $("#nl_email").attr("value");
	var website = $("#nl_website").attr("value");

	if(validEmail(email) == true) {
		
		// Checken ob email schon vorhanden ist
		$.ajax({
   			type: "POST",
   			url: "ajax.php",
   			data: {aktion: "checkNewsletterMail", email: email},
   			success: function(msg){
   				if(msg == "ok") {
					$("#newsletterBox li.blank").html("<p style='text-align:center;height:120px;'><br><br><br><img src='images/ajax-loader.gif' alt='' border='0'></p>");
					
					$.ajax({
   						type: "POST",
   						url: "ajax.php",
   						data: {aktion: "subscribeNewsletter", vorname: vorname, nachname: nachname, email: email, website: website},
   						success: function(msg){
							setTimeout(function() {
       							$("#newsletterBox li.blank").html(msg);
								
    						}, 2000); 
 						}
					});
					
				} else {
					alert(msg);
				}
			}
		});

		return false;
	} else {
		alert("Sie haben keine gültige E-Mail Adresse eingegeben.");
		$("#nl_email").focus();
		return false;
	}
}