/**
 *
 */ 
function subscribeToNewsletter(form_id)
{	
	var name         = document.forms[form_id].name.value;
	var emailaddress = document.forms[form_id].emailaddress.value;
	var extra_1      = (document.forms[form_id].extra1 != null ? document.forms[form_id].extra1.value : "");
	var extra_2      = (document.forms[form_id].extra2 != null ? document.forms[form_id].extra2.value : "");
	var extra_3      = (document.forms[form_id].extra3 != null ? document.forms[form_id].extra3.value : "");
	var extra_4      = (document.forms[form_id].extra4 != null ? document.forms[form_id].extra4.value : "");
	
	//ajax
	$.ajax({
			url     : ROOT_PATH + "module/subscribe_to_gtmailing/subscribe.php?name=" + escape(name) + "&emailaddress=" + escape(emailaddress) + "&extra_1=" + escape(extra_1) + "&extra_2=" + escape(extra_2) + "&extra_3=" + escape(extra_3) + "&extra_4=" + escape(extra_4),
			success : function(data)
					  {
						  if(data.substr(0, 2) == "ok")
						  {
							  document.forms[form_id].name.value         = "";
							  document.forms[form_id].emailaddress.value = "";
							  
							  if(document.forms[form_id].extra1 != null)
								  document.forms[form_id].extra1.value   = "";
								  
							  if(document.forms[form_id].extra2 != null)
							  	document.forms[form_id].extra2.value     = "";
							  
							  if(document.forms[form_id].extra3 != null)
								  document.forms[form_id].extra3.value   = "";
							  
							  if(document.forms[form_id].extra4 != null)
								  document.forms[form_id].extra4.value   = "";
							  
							  //alert("Er is een e-mail naar u verzonden met daarin een bevestigingslink");
							  alert(data.substr(3));
						  }
						  else
						  {
							  alert(data);
						  }
						  
						  return false;
					  }
		   });
	
	return false;
}