function inCart(id) {	
	var pars = 'artikel=' + id;
	var url = linkprefix + 'shop/winkelwagen_toevoegen.php';
	
	var myAjax = new Ajax.Request(
	url, 
	{
		method: 'post', 
		parameters: pars, 
		onComplete: showResponse = function(request) {
			var response = request.responseXML;
			var status = getSingleData(response,'status');
			var bericht = getSingleData(response,'bericht');

			if(status != 0) {
				alert(bericht);
			}
			else {
				// Haal de winkelwagen op
				$('overlay').style.display = '';
				
				// Pop-up laten zien
				var arrPage = getPageSize();
				var offset = document.viewport.getScrollOffsets();
				$('toegevoegd').style.top = Math.round((arrPage[3]-80)/2 + offset[1]) + 'px';
				Effect.Appear('toegevoegd',{ duration: 0.4 });
				
				getCart();
			}
		}
	});
}

function getCart() {
	var url = linkprefix + 'shop/winkelwagen_kort.php'
	
	var myAjax = new Ajax.Request(
	url, 
	{
		method: 'get', 
		onComplete: showResponse = function(request) {
			var response = request.responseText;
			$('winkelwagen').innerHTML = response;
		}
	});
}

function sluitPopup() {
	$('toegevoegd').style.display = 'none';
	$('overlay').style.display = 'none';
}

function getPageSize(){
	
	var xScroll, yScroll;
	
	if (window.innerHeight && window.scrollMaxY) {
		xScroll = document.body.scrollWidth;
		yScroll = window.innerHeight + window.scrollMaxY;
	} else if (document.body.scrollHeight > document.body.offsetHeight){ // all but Explorer Mac
		xScroll = document.body.scrollWidth;
		yScroll = document.body.scrollHeight;
	} else if (document.documentElement && document.documentElement.scrollHeight > document.documentElement.offsetHeight){ // Explorer 6 strict mode
		xScroll = document.documentElement.scrollWidth;
		yScroll = document.documentElement.scrollHeight;
	} else { // Explorer Mac...would also work in Mozilla and Safari
		xScroll = document.body.offsetWidth;
		yScroll = document.body.offsetHeight;
	}
	
	var windowWidth, windowHeight;
	if (self.innerHeight) { // all except Explorer
		windowWidth = self.innerWidth;
		windowHeight = self.innerHeight;
	} else if (document.documentElement && document.documentElement.clientHeight) { // Explorer 6 Strict Mode
		windowWidth = document.documentElement.clientWidth;
		windowHeight = document.documentElement.clientHeight;
	} else if (document.body) { // other Explorers
		windowWidth = document.body.clientWidth;
		windowHeight = document.body.clientHeight;
	}
	
	// for small pages with total height less then height of the viewport
	if(yScroll < windowHeight){
		pageHeight = windowHeight;
	} else {
		pageHeight = yScroll;
	}
	
	// for small pages with total width less then width of the viewport
	if(xScroll < windowWidth){
		pageWidth = windowWidth;
	} else {
		pageWidth = xScroll;
	}
	
	
	arrayPageSize = new Array(pageWidth,pageHeight,windowWidth,windowHeight)
	return arrayPageSize;
}