function slideshow(){
	
	var $current 	= $('div#slideshow_homepage img.layer_1');
	var $next 		= $current.next().length ? $current.next() : $('div#slideshow_homepage img:first');
	
	var iCount 		= countImg();
	
	if (iCount > 1) {
		
		$current.addClass('layer_2');
		$current.removeClass('layer_1');
		
		$next.css({
			opacity: 0.0
		});
		
		$next.addClass('layer_1');
		
		$next.animate({
			opacity: 1.0
		}, 2000, function(){
			$current.removeClass('layer_2');
		});
		
	}
}

function slideUp(iImgID){
	
	var bIsSame 	= false;
	
	var $current 	= $('div#slideshow_homepage img.layer_1');
	var $next 		= $('div#slideshow_homepage img.'+iImgID);
	
	var iCount 		= countImg();
	
	if($current.hasClass(iImgID)){
		bIsSame = true;
	}
	
	if (iCount > 1 && !bIsSame) {
		
		$current.addClass('layer_2');
		$current.removeClass('layer_1');
		
		$next.css({
			opacity: 0.0
		});
		
		$next.addClass('layer_1');
		
		$next.animate({
			opacity: 1.0
		}, 500, function(){
			$current.removeClass('layer_2');
		});
	}
}

function countImg(){
	
	var iCount = 0;
		
	$('div#slideshow_homepage img').each(function(){
  		iCount++;
 	});
	
	return iCount;
}