var i = 0;			
function SwapImage(x,y) {		
	$(image_slide[x]).appear({ duration: 0.5 });
	$(image_slide[y]).fade({duration: 0.5});
}

function StartSlideShow() {
	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++;
	}
	
	var textIn = i+1 + ' of ' + NumOfImages;
}

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;		
					
	} else {
		SwapImage(imageShow,imageHide);			
		i--;
	}
}