function createXMLHttpRequest() {
    
    var ua;
    
    if(window.XMLHttpRequest) {
        try {
        ua = new XMLHttpRequest();
        } catch(e) {
        ua = false;
        }
    } else if(window.ActiveXObject) {
        try {
        ua = new ActiveXObject("Microsoft.XMLHTTP");
        } catch(e) {
        ua = false;
        }
    }
    return ua;
    }
    
    var req = createXMLHttpRequest();
  
  function pageSend() {

	if (1){

	  var aantal = document.getElementById("aantal").value;
	      //alert(aantal);
		  req.open('post', 'mod/functions.php?do=pageSend');
	      req.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
	      req.onreadystatechange = handleResponse;
	      req.send('aantal='+aantal);
		} else {
	    	alert ('Niet alle verplichte velden zijn ingevoerd.');		  
		}
}

  function pageEmail() {
	if (1){
	  var aantal = document.getElementById("aantal").value;
	      //alert(aantal);
		  req.open('post', 'mod/functions.php?do=pageEmail');
	      req.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
	      req.onreadystatechange = handleResponse;
	      req.send('aantal='+aantal);
		} else {
	    	alert ('Niet alle verplichte velden zijn ingevoerd.');		  
		}
}
	
	  function pageSendEmail() {
	if (1){
    
	  var aantal = document.getElementById("aantal").value;
	  var bedrijfsnaam = document.getElementById("bedrijfsnaam").value;
	  var contactpersoon = document.getElementById("contactpersoon").value;
	  var telefoonnummer = document.getElementById("telefoonnummer").value;
	  var email = document.getElementById("email").value;	  
	  var opmerking = document.getElementById("opmerking").value;	  
	  
	    //  alert(aantal);
		  req.open('post', 'mod/functions.php?do=pageSendEmail');
	      req.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
	      req.onreadystatechange = handleResponse;
	      req.send('aantal='+aantal+'&bedrijfsnaam='+bedrijfsnaam+'&contactpersoon='+contactpersoon+'&telefoonnummer='+telefoonnummer+'&email='+email+'&opmerking='+opmerking);
		} else {
	    	alert ('Niet alle verplichte velden zijn ingevoerd.');		  
		}
}
	   
    function handleResponse() {
	   if(req.readyState == 4){
	    	var response = req.responseText;
			var update = new Array();
	        update = response.split('||');
			//alert (response);
			document.getElementById(update[0]).innerHTML = update[1];
	    }   
	    //else
	    //alert("loading" + req.readyState);
    }
   
                    
    function handleEnter (field, event) {
        var keyCode = event.keyCode ? event.keyCode : event.which ? event.which : event.charCode;
        if (keyCode == 13) {
            var i;
            for (i = 0; i < field.form.elements.length; i++)
                if (field == field.form.elements[i])
                break;
            i = (i + 1) % field.form.elements.length;
            field.form.elements[i].focus();
            return false;
        } 
        else
        return true;
    }