function initTumbs() {
	if($('projectthumbsNew')) {
		currentImage = 0;
		totalProjects = projectImages.length; 
		lastImage = projectImages.length - 1;
		firstImage = 0;
		loop = false;
		//alert('/site/dbimages/projecten/afbeeldingen/' + projectImages[ totalProjects - 1 ] + '_foto3.jpg')
		$('thumb_01').style.background = 'url(/site/dbimages/projecten/afbeeldingen/' + projectImages[ totalProjects - 1 ] + '_foto3.jpg) no-repeat center center';
		$('thumb_02').style.background = 'url(/site/dbimages/projecten/afbeeldingen/' + projectImages[ 0 ] + '_foto3.jpg) no-repeat center center';
		$('thumb_03').style.background = 'url(/site/dbimages/projecten/afbeeldingen/' + projectImages[ 1 ] + '_foto3.jpg) no-repeat center center';		

		preloadLargeImages();
	}
}

function preloadLargeImages() {
	preloadedImages = [];
	for(var i = 0 ; i < totalProjects; i++) {
		preloadedImages[ i ] = new Image();	
		preloadedImages[ i ].src = '/site/dbimages/projecten/afbeeldingen/'	+ projectImages[ i ] + '_foto1.jpg';
	}
}

function previousImage() {
	currentImage = currentImage -1;
	if(currentImage < 0) {
		currentImage = lastImage;
	}
	showImages(currentImage)
}

function nextImage() {
	currentImage++;
	if(currentImage > lastImage) {
		currentImage = 0;
	}
	showImages(currentImage)
}

function arrayPosition(num, dir) {
	if(dir == 'left') {
		if(num - 1 < 0)	{
			to = lastImage;
		} else {
			to = num - 1;
		}
	} else if(dir == 'right') {
		if(num + 1 > lastImage) {
			to = firstImage;
		} else {
			to = num + 1;
		}
	}
	return to;
}

function showImages(center) { 
	var previous = arrayPosition(center, 'left');
	var next = arrayPosition(center, 'right');

	$('thumb_01').style.background = 'url(/site/dbimages/projecten/afbeeldingen/' + projectImages[ previous ] + '_foto3.jpg) no-repeat center center';
	$('thumb_02').style.background = 'url(/site/dbimages/projecten/afbeeldingen/' + projectImages[ center ] + '_foto3.jpg) no-repeat center center';
	$('thumb_03').style.background = 'url(/site/dbimages/projecten/afbeeldingen/' + projectImages[ next ] + '_foto3.jpg) no-repeat center center';		
	
	$('page').style.background = 'url(/site/dbimages/projecten/afbeeldingen/' + projectImages[ center ] + '_foto1.jpg) no-repeat scroll 0 10px transparent';
	//alert('eerste: ' + projectImages[ previous ] + '\n' + 'tweede: ' + projectImages[ center ] + '\n' + 'derde: ' + projectImages[ next ] )
}

function playInLoop() {
	
	switch(loop) {
		case true: 
			loop = false;
		break;
		case false: 
			loop = true;
		break;
	}
	
	if(loop == true) {
		$('slideshow_loop').src = '/site/images/slide_stop.png';
	} else {
		$('slideshow_loop').src = '/site/images/slide_play.png';
	}
	if(loop ==  true) {
		//Direct nextImage zodat je niet eerst 3 seconden moet wachten voordat de slideshow begint:
		nextImage();
		window.setInterval('if(loop==true) {nextImage()}', 3000);		
	}

	 
}

//####### 

	function getProjectThumbs(page,artikelnummer) {
		var url = '/site/modules/project_thumbs/getProjectThumbs_ajax.helper.php';
		var pars = 'page='+escape(page)+'&artikelnummer='+escape(artikelnummer);
		var myAjax 	= new Ajax.Request( url, {
											method: 'post', 
											parameters: pars, 
											onSuccess: function(transport) {
															$('projectthumbs').innerHTML = transport.responseText;
													   },
											onFailure: function(transport) {
															alert('connection failed...');
													   }
											  }
									   );
	}