function IncludeJavaScript(jsFile)
{
  document.write('<script type="text/javascript" src="'
    + jsFile + '"></scr' + 'ipt>'); 
}




var xmlhttp;
function createHTTPHandler(){
    http_request = false;
      if (window.XMLHttpRequest) { // Mozilla, Safari,...
         http_request = new XMLHttpRequest();
         if (http_request.overrideMimeType) {
         	// set type accordingly to anticipated content type
            //http_request.overrideMimeType('text/xml');
            http_request.overrideMimeType('text/html');
         }
      } else if (window.ActiveXObject) { // IE
         try {
            http_request = new ActiveXObject("Msxml2.XMLHTTP");
         } catch (e) {
            try {
               http_request = new ActiveXObject("Microsoft.XMLHTTP");
            } catch (e) {}
         }
      }
      if (!http_request) {
         alert('Cannot create XMLHTTP instance');
         return false;
      }
      else return http_request;
}


xmlhttp = createHTTPHandler();


function show(page){
	document.getElementById('maintext').innerHTML = '<br><br><br><br><br><center><img src="pix/preloader.gif"></center>';
   xmlhttp.open("GET", page,true);//method, target, async (set always true!)
    
    xmlhttp.onreadystatechange=function() {
        if (xmlhttp.readyState==4) {
            document.getElementById('maintext').innerHTML = xmlhttp.responseText;
        }
    }
    
    xmlhttp.send(null);
}
function postGuestbook(query)
{
	  
  	var naam = document.form1.name.value;
  	var bericht = document.form1.message.value;
  	
  	if(naam=='') alert('Er is geen naam ingevuld');
    else if(bericht=='') alert('Er is geen bericht ingevuld');
    else
    {
      
      var homepage = document.form1.homepage.value;
      var email = document.form1.email.value;
      document.getElementById('maintext').innerHTML = '<br><br><br><br><br><center><img src="pix/preloader.gif"></center>';
      xmlhttp.open('POST', 'guestbook_post.php', true);
  	  xmlhttp.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
    	xmlhttp.send('naam='+naam+'&email='+email+'&homepage='+homepage+'&bericht='+bericht); 
      alert('Nae goodkeuring wurd ut bericht geplaatst'); 
    	xmlhttp.onreadystatechange=function() 
    	{
          if (xmlhttp.readyState==4) 
          {
            show('guestbook_view.php');
          }
      }
    }
}
function sendMail()
{
	  
  	var naam = document.form1.afzender.value;
  	var email = document.form1.email.value;
  	var naar = document.form1.naar.value;
  	var onderwerp = document.form1.onderwerp.value;
  	var bericht = document.form1.bericht.value;
  	
  	if(naam=='') alert('Er is geen naam ingevuld');
    else if(bericht=='') alert('Er is geen bericht ingevuld');
    else if(email=='') alert('Er is geen emailadres ingevuld');    
    else
    {
      document.getElementById('maintext').innerHTML = '<br><br><br><br><br><center><img src="pix/preloader.gif"></center>';
      xmlhttp.open('POST', 'meelos_post.php', true);
  	  xmlhttp.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
      xmlhttp.send('naam='+naam+'&email='+email+'&naar='+naar+'&onderwerp='+onderwerp+'&bericht='+bericht);  
      xmlhttp.onreadystatechange=function() 
      {
          if (xmlhttp.readyState==4) 
          {
          	alert('Ut bericht is versjtuurd naor '+naar);
            show('meelos.php');
          }
      }
    }
}	
function sendMessage(naam,homepage,bericht)
{
	document.getElementById('welkom').innerHTML = '<br><center><img src="images/preloader.gif"></center>';
	xmlhttp.open("POST", 'page.php?page=gastenboek_schrijven');
	xmlhttp.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
    xmlhttp.send('naam='+naam+'&homepage='+homepage+'&bericht='+bericht);
    xmlhttp.onreadystatechange=function() {
        if (xmlhttp.readyState==4) {
            if(naam != '' && bericht != '')
            {
            	document.getElementById('welkom').innerHTML ='<br><center>Het bericht is geplaatst, u wordt zo doorgestuurd.</center>';
            	setTimeout("show('gastenboek')", 1500);
            }
            else document.getElementById('maincontent').innerHTML = xmlhttp.responseText;
        }
    }
    
}
function sendContactMail(van,email,onderwerp,bericht,captcha)
{

	document.getElementById('welkom').innerHTML = '<br><center><img src="images/preloader.gif"></center>';
	xmlhttp.open("POST", 'mail.php');
	xmlhttp.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
    xmlhttp.send('afzender='+van+'&email='+email+'&onderwerp='+onderwerp+'&bericht='+bericht+'&captcha='+captcha);
    xmlhttp.onreadystatechange=function() {
        if (xmlhttp.readyState==4) {
            if(van != '' && email != '')
            {
            	document.getElementById('welkom').innerHTML ='<br><center>Uw email is verzonden.</center>';
            	setTimeout("show('home')", 1500);
            }
            else document.getElementById('maincontent').innerHTML = xmlhttp.responseText;
        }
    }
    
}