// set the starting image.
var i = 0;			

// The array of div names which will hold the images.

//var image_slide = new Array('image-1', 'image-2');
var image_slide = new Array();
// The number of images in the array.
//var NumOfImages = image_slide.length;
var NumOfImages;
// The time to wait before moving to the next image. Set to 3 seconds by default.
var wait = 6000;

// The Fade Function
function SwapImage(x,y) {		
	$(image_slide[x]).appear({ duration: 1.5 });
	$(image_slide[y]).fade({duration: 1.5});
}

// the onload event handler that starts the fading.
function StartSlideShow() {
	var z =0;
	if(this.image_slide.length<1){
		for(var p = 1; p<=document.getElementById('aantal_slides').value;p++){
			this.image_slide[z] = 'image-'+p;
			z++;
		}
		this.NumOfImages = this.image_slide.length;
	}
	play = setInterval('Play()',wait);
								
}

function Play() {
	var imageShow, imageHide;

	imageShow = i+1;
	imageHide = i;
	
	if (imageShow == NumOfImages) {
		SwapImage(0,imageHide);	
		i = 0;					
	} else {
		SwapImage(imageShow,imageHide);			
		i++;
	}
}

function Stop () {
	clearInterval(play);				

}

function GoNext() {
	clearInterval(play);

	
	var imageShow, imageHide;

	imageShow = i+1;
	imageHide = i;
	
	if (imageShow == NumOfImages) {
		SwapImage(0,imageHide);	
		i = 0;					
	} else {
		SwapImage(imageShow,imageHide);			
		i++;
	}
}

function GoPrevious() {
	clearInterval(play);


	var imageShow, imageHide;
				
	imageShow = i-1;
	imageHide = i;
	
	if (i == 0) {
		SwapImage(NumOfImages-1,imageHide);	
		i = NumOfImages-1;		
		
		//alert(NumOfImages-1 + ' and ' + imageHide + ' i=' + i)
					
	} else {
		SwapImage(imageShow,imageHide);			
		i--;
		
		//alert(imageShow + ' and ' + imageHide)
	}
}