function ajaxUpdateAgenda(agenda_select) {
 toDay = new Date();
 datumtijd = toDay.getTime();
 var xmlHttp;
 try {
   xmlHttp = new XMLHttpRequest();
 } catch (e) {
   try {
     xmlHttp = new ActiveXObject("Msxml2.XMLHTTP");
   } catch (e) {
     try {
       xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
     } catch (e) {
       alert("Your browser is old and does not have AJAX support!");
       return false;
     }
   }
 }
 xmlHttp.onreadystatechange = function() {
   if(xmlHttp.readyState == 4) {
     var responseText = xmlHttp.responseText;
     document.getElementById('agenda_left_small').innerHTML = responseText;
   }
 }

 var xmlParams = "";
 xmlParams = xmlParams + "agenda_select=" + agenda_select + "&";
 xmlParams = xmlParams + "datumtijd=" + datumtijd + "&";      

 xmlHttp.open("GET", "/content/left_agenda_exec.asp?" + xmlParams, true);
 xmlHttp.send(null);
}

function ajaxNieuwsbrief(emailadres, meldWhat) {
 if (emailadres.value != "" && emailadres.value != "Aanmelden nieuwsbrief") {
   var goodEmail = emailadres.value.match(/\b(^(\S+@).+((\.com)|(\.net)|(\.edu)|(\.mil)|(\.gov)|(\.biz)|(\.org)|(\.info)|(\..{2,2}))$)\b/gi);		
   if (!goodEmail) {
     alert("Ongeldig emailadres, probeer opnieuw.");
     emailadres.focus();
   } else {
     toDay = new Date();
     datumtijd = toDay.getTime();
     var xmlHttp;
     try {
       xmlHttp = new XMLHttpRequest();
     } catch (e) {
       try {
         xmlHttp = new ActiveXObject("Msxml2.XMLHTTP");
       } catch (e) {
         try {
           xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
         } catch (e) {
           alert("Your browser is old and does not have AJAX support!");
           return false;
         }
       }
     }
     xmlHttp.onreadystatechange = function() {
       if(xmlHttp.readyState == 4) {
         alert(xmlHttp.responseText);
       }
     }
     var xmlParams = "";
     xmlParams = xmlParams + "emailadres=" + emailadres.value + "&";
     xmlParams = xmlParams + "meldWhat=" + meldWhat + "&";
     xmlParams = xmlParams + "datumtijd=" + datumtijd + "&";      
     xmlHttp.open("GET", "/content/left_nieuwsbrief_exec.asp?" + xmlParams, true);
     xmlHttp.send(null);
   }
 }
}