function uitklappen(id)
{
	var uitklap = '#'+id;
	$(uitklap).slideToggle();
	
	if (document.getElementById('lees_verder').innerHTML == 'Lees verder >>')
		var uitklappen = '1';
	
	if (document.getElementById('lees_verder').innerHTML == 'Lees verder uit >>')
		var inklappen = '1';
	
	if (uitklappen == '1')
		document.getElementById('lees_verder').innerHTML = 'Lees verder uit >>';
	
	if (inklappen == '1')
		document.getElementById('lees_verder').innerHTML = 'Lees verder >>';
}


function nieuwsbrief(waar,naam,email)
{
	
	document.getElementById(waar).innerHTML = "<img src='images/load.gif'>";
	var waar		= waar;
	var naam		= document.getElementById(naam).value;
	var email		= document.getElementById(email).value;
	var xmlhttp 	= makeXmlHttp();
	
	xmlhttp.open('POST','inc/inschrijven.php',true);
	xmlhttp.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
	xmlhttp.send('naam=' + naam + '&email=' + email)
	xmlhttp.onreadystatechange = function()
	{
		if (xmlhttp.readyState == 4)
		{
			document.getElementById(waar).innerHTML=xmlhttp.responseText;
		}
	}
}


function contact(waar,naam,telefoon,netnummer)
{
	document.getElementById(waar).innerHTML = "<img src='images/load.gif'>";
	var waar		= waar;
	var naam		= document.getElementById(naam).value;
	var telefoon	= document.getElementById(telefoon).value;
	var netnummer  = document.getElementById(netnummer).value;
	var xmlhttp 	= makeXmlHttp();
	
	xmlhttp.open('POST','inc/contact.php',true);
	xmlhttp.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
	xmlhttp.send('naam=' + naam + '&telefoon=' + telefoon + '&netnummer=' + netnummer)
	xmlhttp.onreadystatechange = function()
	{
		if (xmlhttp.readyState == 4)
		{
			document.getElementById(waar).innerHTML=xmlhttp.responseText;
		}
	}
}


var DDSPEED = 10;
var DDTIMER = 15;

// main function to handle the mouse events //
function ddMenu(id,d){
  var h = document.getElementById(id + '-ddheader');
  var c = document.getElementById(id + '-ddcontent');
  clearInterval(c.timer);
  if(d == 1){
    clearTimeout(h.timer);
    if(c.maxh && c.maxh <= c.offsetHeight){return}
    else if(!c.maxh){
      c.style.display = 'block';
      c.style.height = 'auto';
      c.maxh = c.offsetHeight;
      c.style.height = '0px';
    }
    c.timer = setInterval(function(){ddSlide(c,1)},DDTIMER);
  }else{
    h.timer = setTimeout(function(){ddCollapse(c)},50);
  }
}

// collapse the menu //
function ddCollapse(c){
  c.timer = setInterval(function(){ddSlide(c,-1)},DDTIMER);
}

// cancel the collapse if a user rolls over the dropdown //
function cancelHide(id){
  var h = document.getElementById(id + '-ddheader');
  var c = document.getElementById(id + '-ddcontent');
  clearTimeout(h.timer);
  clearInterval(c.timer);
  if(c.offsetHeight < c.maxh){
    c.timer = setInterval(function(){ddSlide(c,1)},DDTIMER);
  }
}

// incrementally expand/contract the dropdown and change the opacity //
function ddSlide(c,d){
  var currh = c.offsetHeight;
  var dist;
  if(d == 1){
    dist = (Math.round((c.maxh - currh) / DDSPEED));
  }else{
    dist = (Math.round(currh / DDSPEED));
  }
  if(dist <= 1 && d == 1){
    dist = 1;
  }
  c.style.height = currh + (dist * d) + 'px';
  c.style.opacity = currh / c.maxh;
  c.style.filter = 'alpha(opacity=' + (currh * 100 / c.maxh) + ')';
  if((currh < 2 && d != 1) || (currh > (c.maxh - 2) && d == 1)){
    clearInterval(c.timer);
  }
}

function bookmark(url,title){
  if ((navigator.appName == "Microsoft Internet Explorer") && (parseInt(navigator.appVersion) >= 4)) {
  window.external.AddFavorite(url,title);
  } else if (navigator.appName == "Netscape") {
    window.sidebar.addPanel(title,url,"");
  } else {
    alert("Press CTRL-D (Netscape) or CTRL-T (Opera) to bookmark");
  }
}